TY  - JOUR
AU  - Popović, Milka
AU  - Baltić, Milan Ž.
AU  - Gusman, Vera
AU  - Anđelković, Radivoje
AU  - Velicki, Radmila
AU  - Bjelanović, Jelena
AU  - Mitrović, Radmila
AU  - Janjić, Jelena
PY  - 2022
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2576
AB  - Background/Aim. Establishing a food safety control sys-tem is extremely important in preventing diseases associated with foodborne pathogens. The aim of this study was to ex-amine the hygiene status of food contact surfaces and the ap-plication of good hygiene practices by food handlers in school canteens. Methods. A total of 10,366 swabs were tak-en from food contact surfaces, including food handler's hands from public school canteens in Novi Sad, Serbia, over ten years (2008-2017), covering voluntary good hygiene prac-tices and obligatory Hazard Analysis Critical Control Points (HACCP) implementation periods. Results. Statistically sig-nificant differences (p < 0.05) in aerobic colony counts (ACCs) on surfaces between two examined periods were found. A general positive trend regarding the reduction of microbial contamination of food contact surfaces was ob-served. The percentage of surfaces swabs with ACCs above 2.48 log CFU/cm2 significantly decreased (R2 = 0.453) during the study period, and the percentage of coagulase-positive Staphylococcus in the swabs also decreased, but not significantly (R2 = 0.264), and average annual Enterobacteriaceae counts above the established limit values on surfaces significantly de-creased (R2 = 0.442) over the years. A significantly higher (p < 0.05) percentage of workers' hands harbored ACCs, coagu-lase-positive Staphylococcus, and Enterobacteriaceae above the es-tablished limits than the equipment or work surfaces. Con-clusion. The results obtained showed the proper implemen-tation of good hygiene practices concerning food contact sur-faces, but the implementation of good personal hygiene prac-tices needs enhanced supervision.
AB  - Uvod/Cilj. Uspostavljanje sistema kontrole bezbednosti je
izuzetno važno u prevenciji bolesti povezanih sa patogenima koje
se prenose hranom. Cilj ovog istraživanja bio je da se utvrdi
higijenski status kontaktnih površina i primena dobre higijenske
prakse pri rukovanju hranom u školskim kantinama. Metode.
Ukupno 10 366 briseva uzeto je sa površina koje dolaze u kontakt
s hranom i ruku osoblja zaposlenog u školskim kantinama u
Novom Sadu u desetogodišnjem periodu (2008–2017). Istraživanje
je uključivalo dva perioda: a) dobrovoljnu primenu dobre
higijenske prakse i b) obaveznu implementaciju sistema Hazard
Analysis Critical Control Points (HACCP). Rezultati. Statistički
značajna razlika (p < 0,05) utvrđena je u ukupnom broju aerobnih
bakterija (aerobic colony counts -ACCs) na površinama. Primećen je
opšti pozitivni trend u pogledu smanjenja mikrobiološke
kontaminacije površina koje dolaze u kontakt s namirnicama.
Učestalost nalaza briseva sa utvrđenim ukupnim ACCs iznad 2,48
log CFU/cm2 smanjivala se statistički značajno (R2 = 0,453) tokom
perioda ispitivanja; učestalost prisustva koagulaza pozitivnih
stafilokoka se takođe smanjivala, ali ne statistički značajno (R2 =
0,264), dok se prosečan broj enterobakterija iznad utvrđenih
graničnih vrednosti na površinama statistički značajno smanjio
tokom godina (R2 = 0,442). Na brisevima ruku ispitanog osoblja
utvrđena je statistički značajno viša (p < 0,05) učestalost prisustva
ukupnog ACCs, koagulaza pozitivnih stafilokoka i enterobakterija
iznad utvrđenih granica u odnosu na briseve uzete sa opreme ili
radnih površina. Zaključak. Dobijeni rezultati pokazuju pravilnu
primenu dobre higijenske prakse kada su u pitanju površine koje
dolaze u kontakt s hranom, dok implementacija prakse dobre lične
higijene zaposlenih zahteva pojačan nadzor
PB  - Belgrade : Inst. Sci. inf., Univ. Defence in Belgrade
T2  - Vojnosanitetski Pregled: Military Medical and Pharmaceutical Journal of Serbia
T1  - Hygiene status of food contact surfaces in public school canteens in the city of Novi Sad, Serbia
VL  - 79
IS  - 9
SP  - 883
EP  - 889
DO  - 10.2298/VSP200521050P
ER  - 

@article{
author = "Popović, Milka and Baltić, Milan Ž. and Gusman, Vera and Anđelković, Radivoje and Velicki, Radmila and Bjelanović, Jelena and Mitrović, Radmila and Janjić, Jelena",
year = "2022",
abstract = "Background/Aim. Establishing a food safety control sys-tem is extremely important in preventing diseases associated with foodborne pathogens. The aim of this study was to ex-amine the hygiene status of food contact surfaces and the ap-plication of good hygiene practices by food handlers in school canteens. Methods. A total of 10,366 swabs were tak-en from food contact surfaces, including food handler's hands from public school canteens in Novi Sad, Serbia, over ten years (2008-2017), covering voluntary good hygiene prac-tices and obligatory Hazard Analysis Critical Control Points (HACCP) implementation periods. Results. Statistically sig-nificant differences (p < 0.05) in aerobic colony counts (ACCs) on surfaces between two examined periods were found. A general positive trend regarding the reduction of microbial contamination of food contact surfaces was ob-served. The percentage of surfaces swabs with ACCs above 2.48 log CFU/cm2 significantly decreased (R2 = 0.453) during the study period, and the percentage of coagulase-positive Staphylococcus in the swabs also decreased, but not significantly (R2 = 0.264), and average annual Enterobacteriaceae counts above the established limit values on surfaces significantly de-creased (R2 = 0.442) over the years. A significantly higher (p < 0.05) percentage of workers' hands harbored ACCs, coagu-lase-positive Staphylococcus, and Enterobacteriaceae above the es-tablished limits than the equipment or work surfaces. Con-clusion. The results obtained showed the proper implemen-tation of good hygiene practices concerning food contact sur-faces, but the implementation of good personal hygiene prac-tices needs enhanced supervision., Uvod/Cilj. Uspostavljanje sistema kontrole bezbednosti je
izuzetno važno u prevenciji bolesti povezanih sa patogenima koje
se prenose hranom. Cilj ovog istraživanja bio je da se utvrdi
higijenski status kontaktnih površina i primena dobre higijenske
prakse pri rukovanju hranom u školskim kantinama. Metode.
Ukupno 10 366 briseva uzeto je sa površina koje dolaze u kontakt
s hranom i ruku osoblja zaposlenog u školskim kantinama u
Novom Sadu u desetogodišnjem periodu (2008–2017). Istraživanje
je uključivalo dva perioda: a) dobrovoljnu primenu dobre
higijenske prakse i b) obaveznu implementaciju sistema Hazard
Analysis Critical Control Points (HACCP). Rezultati. Statistički
značajna razlika (p < 0,05) utvrđena je u ukupnom broju aerobnih
bakterija (aerobic colony counts -ACCs) na površinama. Primećen je
opšti pozitivni trend u pogledu smanjenja mikrobiološke
kontaminacije površina koje dolaze u kontakt s namirnicama.
Učestalost nalaza briseva sa utvrđenim ukupnim ACCs iznad 2,48
log CFU/cm2 smanjivala se statistički značajno (R2 = 0,453) tokom
perioda ispitivanja; učestalost prisustva koagulaza pozitivnih
stafilokoka se takođe smanjivala, ali ne statistički značajno (R2 =
0,264), dok se prosečan broj enterobakterija iznad utvrđenih
graničnih vrednosti na površinama statistički značajno smanjio
tokom godina (R2 = 0,442). Na brisevima ruku ispitanog osoblja
utvrđena je statistički značajno viša (p < 0,05) učestalost prisustva
ukupnog ACCs, koagulaza pozitivnih stafilokoka i enterobakterija
iznad utvrđenih granica u odnosu na briseve uzete sa opreme ili
radnih površina. Zaključak. Dobijeni rezultati pokazuju pravilnu
primenu dobre higijenske prakse kada su u pitanju površine koje
dolaze u kontakt s hranom, dok implementacija prakse dobre lične
higijene zaposlenih zahteva pojačan nadzor",
publisher = "Belgrade : Inst. Sci. inf., Univ. Defence in Belgrade",
journal = "Vojnosanitetski Pregled: Military Medical and Pharmaceutical Journal of Serbia",
title = "Hygiene status of food contact surfaces in public school canteens in the city of Novi Sad, Serbia",
volume = "79",
number = "9",
pages = "883-889",
doi = "10.2298/VSP200521050P"
}

Popović, M., Baltić, M. Ž., Gusman, V., Anđelković, R., Velicki, R., Bjelanović, J., Mitrović, R.,& Janjić, J.. (2022). Hygiene status of food contact surfaces in public school canteens in the city of Novi Sad, Serbia. in Vojnosanitetski Pregled: Military Medical and Pharmaceutical Journal of Serbia
Belgrade : Inst. Sci. inf., Univ. Defence in Belgrade., 79(9), 883-889.
https://doi.org/10.2298/VSP200521050P

Popović M, Baltić MŽ, Gusman V, Anđelković R, Velicki R, Bjelanović J, Mitrović R, Janjić J. Hygiene status of food contact surfaces in public school canteens in the city of Novi Sad, Serbia. in Vojnosanitetski Pregled: Military Medical and Pharmaceutical Journal of Serbia. 2022;79(9):883-889.
doi:10.2298/VSP200521050P .

Popović, Milka, Baltić, Milan Ž., Gusman, Vera, Anđelković, Radivoje, Velicki, Radmila, Bjelanović, Jelena, Mitrović, Radmila, Janjić, Jelena, "Hygiene status of food contact surfaces in public school canteens in the city of Novi Sad, Serbia" in Vojnosanitetski Pregled: Military Medical and Pharmaceutical Journal of Serbia, 79, no. 9 (2022):883-889,
https://doi.org/10.2298/VSP200521050P . .

TY  - CONF
AU  - Popović, M.
AU  - Velicki, R.
AU  - Torović, Lj
AU  - Bjelanović, J.
AU  - Janjić, Jelena
AU  - Mitrović, Radmila
AU  - Baltić, Milan Ž.
PY  - 2019
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1700
AB  - Although sodium is an essential nutrient, conclusive scientific evidence suggests the association between excessive salt intake and various negative health outcomes. One of the health consequences with the greatest public health impact is the increase in population blood pressure with a consequent increase of cardiovascular disease risk. There is ample evidence linking high salt intake with other health outcomes: stomach cancer, impaired renal function, osteoporosis, obesity, severity of asthma, but also with novel health risks established with advanced molecular and metagenomics technology: autoimmunity, immunity in various organs and systems. Some recent studies have reported that a high salt diet modulates the gut microbiome, interacting with both the hosts gastrointestinal tract environment and its genome and metabolism. The newest evidence indicates possible novel pathophysiological mechanisms of obesity, including high fasting ghrelin in healthy individuals consuming a high-salt diet, as well as endogenous fructose production and leptin resistance in mice. This revealing new evidence links high salt intake with obesity and consequently, with further metabolic complications. As a country with high prevalences of obesity and hypertension, and high salt intake, Serbia would greatly benefit from adopting and implementing a national sodium reduction program that minimize risks through education, regulation, and enforcement.
PB  - Iop Publishing Ltd, Bristol
C3  - 60th International Meat Industry Conference (MEATCON2019)
T1  - Novel paradigms linking salt and health
VL  - 333
SP  - UNSP 012036
DO  - 10.1088/1755-1315/333/1/012036
ER  - 

@conference{
author = "Popović, M. and Velicki, R. and Torović, Lj and Bjelanović, J. and Janjić, Jelena and Mitrović, Radmila and Baltić, Milan Ž.",
year = "2019",
abstract = "Although sodium is an essential nutrient, conclusive scientific evidence suggests the association between excessive salt intake and various negative health outcomes. One of the health consequences with the greatest public health impact is the increase in population blood pressure with a consequent increase of cardiovascular disease risk. There is ample evidence linking high salt intake with other health outcomes: stomach cancer, impaired renal function, osteoporosis, obesity, severity of asthma, but also with novel health risks established with advanced molecular and metagenomics technology: autoimmunity, immunity in various organs and systems. Some recent studies have reported that a high salt diet modulates the gut microbiome, interacting with both the hosts gastrointestinal tract environment and its genome and metabolism. The newest evidence indicates possible novel pathophysiological mechanisms of obesity, including high fasting ghrelin in healthy individuals consuming a high-salt diet, as well as endogenous fructose production and leptin resistance in mice. This revealing new evidence links high salt intake with obesity and consequently, with further metabolic complications. As a country with high prevalences of obesity and hypertension, and high salt intake, Serbia would greatly benefit from adopting and implementing a national sodium reduction program that minimize risks through education, regulation, and enforcement.",
publisher = "Iop Publishing Ltd, Bristol",
journal = "60th International Meat Industry Conference (MEATCON2019)",
title = "Novel paradigms linking salt and health",
volume = "333",
pages = "UNSP 012036",
doi = "10.1088/1755-1315/333/1/012036"
}

Popović, M., Velicki, R., Torović, L., Bjelanović, J., Janjić, J., Mitrović, R.,& Baltić, M. Ž.. (2019). Novel paradigms linking salt and health. in 60th International Meat Industry Conference (MEATCON2019)
Iop Publishing Ltd, Bristol., 333, UNSP 012036.
https://doi.org/10.1088/1755-1315/333/1/012036

Popović M, Velicki R, Torović L, Bjelanović J, Janjić J, Mitrović R, Baltić MŽ. Novel paradigms linking salt and health. in 60th International Meat Industry Conference (MEATCON2019). 2019;333:UNSP 012036.
doi:10.1088/1755-1315/333/1/012036 .

Popović, M., Velicki, R., Torović, Lj, Bjelanović, J., Janjić, Jelena, Mitrović, Radmila, Baltić, Milan Ž., "Novel paradigms linking salt and health" in 60th International Meat Industry Conference (MEATCON2019), 333 (2019):UNSP 012036,
https://doi.org/10.1088/1755-1315/333/1/012036 . .

TY  - JOUR
AU  - Popović-Vranješ, Anka
AU  - Paskaš, Snežana
AU  - Becskei, Zsolt
AU  - Jevtić, Marija
AU  - Krstović, Saša
PY  - 2018
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1835
AB  - Organic farming represents agricultural practice that could contribute to the preservation of biological diversity and breeding of cows with the most desired milk quality attributes. Milk composition could vary widely according to genetic diversity of the animals and different feeding systems. These are related to higher dry matter content, fat, protein and a more favorable ratio of the saturated/unsaturated fatty acids, which is important in traditional cheese production. Standard chemical analyzes were performed and this paper shows the differences in the chemical properties and the fatty acid profile of milk, depending on the different breeds and breeding methods of animals. Simmental milk (indoors) was most abundant in dry matter and fat (13.01 and 4.30%, respectively) while protein and casein level was the highest in the Busha milk (3.67 and 2.63%, respectively). Holstein Friesian milk (organic) possessed a more constant composition and, together with Busha appropriate hygienic quality of milk (low level of somatic cells and total bacteria count). Also, milk from Holstein Friesian cows (organic) was disposed with better nutritional quality and more desirable fatty acid profile (SFA (63.40%), MUFA (30.79%) and PUFA (5.72 %)). On the other hand, Holstein Friesian (conventional) milk contained SFA (67.45%), MUFA (29.27%) and PUFA (3.28%) while Simmental (indoors) higher values of SFA (71.21%) and less MUFA (25.39%) and PUFA (3.40%). There are various ways to preserve biodiversity and the application of organic production standards in the traditional cheese production contributes to obtaining safer, quality products which are more recognizable on the market.
PB  - De Gruyter
T2  - Contemporary Agriculture
T1  - The Impact of Organic Agriculture on Biodiversity Conservation and Milk Quality for Traditional Cheese Production
VL  - 67
IS  - 1
SP  - 58
EP  - 64
DO  - 10.2478/contagri-2018-0009
ER  - 

@article{
author = "Popović-Vranješ, Anka and Paskaš, Snežana and Becskei, Zsolt and Jevtić, Marija and Krstović, Saša",
year = "2018",
abstract = "Organic farming represents agricultural practice that could contribute to the preservation of biological diversity and breeding of cows with the most desired milk quality attributes. Milk composition could vary widely according to genetic diversity of the animals and different feeding systems. These are related to higher dry matter content, fat, protein and a more favorable ratio of the saturated/unsaturated fatty acids, which is important in traditional cheese production. Standard chemical analyzes were performed and this paper shows the differences in the chemical properties and the fatty acid profile of milk, depending on the different breeds and breeding methods of animals. Simmental milk (indoors) was most abundant in dry matter and fat (13.01 and 4.30%, respectively) while protein and casein level was the highest in the Busha milk (3.67 and 2.63%, respectively). Holstein Friesian milk (organic) possessed a more constant composition and, together with Busha appropriate hygienic quality of milk (low level of somatic cells and total bacteria count). Also, milk from Holstein Friesian cows (organic) was disposed with better nutritional quality and more desirable fatty acid profile (SFA (63.40%), MUFA (30.79%) and PUFA (5.72 %)). On the other hand, Holstein Friesian (conventional) milk contained SFA (67.45%), MUFA (29.27%) and PUFA (3.28%) while Simmental (indoors) higher values of SFA (71.21%) and less MUFA (25.39%) and PUFA (3.40%). There are various ways to preserve biodiversity and the application of organic production standards in the traditional cheese production contributes to obtaining safer, quality products which are more recognizable on the market.",
publisher = "De Gruyter",
journal = "Contemporary Agriculture",
title = "The Impact of Organic Agriculture on Biodiversity Conservation and Milk Quality for Traditional Cheese Production",
volume = "67",
number = "1",
pages = "58-64",
doi = "10.2478/contagri-2018-0009"
}

Popović-Vranješ, A., Paskaš, S., Becskei, Z., Jevtić, M.,& Krstović, S.. (2018). The Impact of Organic Agriculture on Biodiversity Conservation and Milk Quality for Traditional Cheese Production. in Contemporary Agriculture
De Gruyter., 67(1), 58-64.
https://doi.org/10.2478/contagri-2018-0009

Popović-Vranješ A, Paskaš S, Becskei Z, Jevtić M, Krstović S. The Impact of Organic Agriculture on Biodiversity Conservation and Milk Quality for Traditional Cheese Production. in Contemporary Agriculture. 2018;67(1):58-64.
doi:10.2478/contagri-2018-0009 .

Popović-Vranješ, Anka, Paskaš, Snežana, Becskei, Zsolt, Jevtić, Marija, Krstović, Saša, "The Impact of Organic Agriculture on Biodiversity Conservation and Milk Quality for Traditional Cheese Production" in Contemporary Agriculture, 67, no. 1 (2018):58-64,
https://doi.org/10.2478/contagri-2018-0009 . .

TY  - JOUR
AU  - Popović-Vranješ, Anka
AU  - Savić, Mila
AU  - Pejanović, R.
AU  - Jovanović, S.
AU  - Krajinović, G.
PY  - 2011
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/811
AB  - In recent years there is growing interest of consumers for the consumption of organic milk, because of its favorable content of fatty acids that has a positive effect on human health. The aim of this study was to examine the content of fatty acids, vitamins A, C and α - tocopherol in milk which was obtained in different production systems, organic and conventional. The samples of conventional and organic milk were collected from farms located in Vojvodina, throughout all seasons. The prepared samples were analyzed using gas chromatography with mass spectrometry and high - performance liquid chromatography. The results proved that the milk produced in accordance with the principles of organic production had a higher content of polyunsaturated and omega-3 fatty acids compared with conventional milk (p lt 0.01) during the whole examination period, while the greatest differences were perceived in the pasture season. Also, organic milk had a higher content of vitamins A, C and α - tocopherol compared with the conventionally produced milk, although there was no statistically significant difference.
AB  - Poslednjih godina raste interes potrošača za konzumiranje organskog mleka, zbog povoljnijeg sadržaja masnih kiselina koje imaju pozitivan efekat na zdravlje ljudi. Cilj ovog rada je bio da se ispita sadržaj masnih kiselina, vitamina A, C i α-tokoferola u mleku koje je dobijeno u različitim sistemima proizvodnje, organskom i konvencionalnom. Uzorci konvencionalnog i organskog mleka sakupljani su na farmama u Vojvodini tokom čitave godine. Analiza uzoraka je vršena primenom metoda gasne hromatografije i tečne hromatografije. Rezultati su pokazali da je mleko proizvedeno po principima organske proizvodnje tokom celog perioda praćenja imalo veći sadržaj polinezasićenih i omega-3 masnih kiselina u odnosu na konvencionalno mleko (p lt 0,01), s tim što su najveće razlike bile u sezoni paše. Sadržaj vitamina A, C i α -tokoferola bio je veći u organskom mleku od sadržaja u mleku iz konvencionalne proizvodnje, mada nije utvrđena statistička značajnost ovih razlika.
PB  - Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd
T2  - Acta Veterinaria-Beograd
T1  - The effect of organic milk production on certain milk quality parameters
T1  - Efekat organske proizvodnje mleka na neke parametre kvaliteta mleka
VL  - 61
IS  - 4
SP  - 415
EP  - 421
DO  - 10.2298/AVB1104415P
ER  - 

@article{
author = "Popović-Vranješ, Anka and Savić, Mila and Pejanović, R. and Jovanović, S. and Krajinović, G.",
year = "2011",
abstract = "In recent years there is growing interest of consumers for the consumption of organic milk, because of its favorable content of fatty acids that has a positive effect on human health. The aim of this study was to examine the content of fatty acids, vitamins A, C and α - tocopherol in milk which was obtained in different production systems, organic and conventional. The samples of conventional and organic milk were collected from farms located in Vojvodina, throughout all seasons. The prepared samples were analyzed using gas chromatography with mass spectrometry and high - performance liquid chromatography. The results proved that the milk produced in accordance with the principles of organic production had a higher content of polyunsaturated and omega-3 fatty acids compared with conventional milk (p lt 0.01) during the whole examination period, while the greatest differences were perceived in the pasture season. Also, organic milk had a higher content of vitamins A, C and α - tocopherol compared with the conventionally produced milk, although there was no statistically significant difference., Poslednjih godina raste interes potrošača za konzumiranje organskog mleka, zbog povoljnijeg sadržaja masnih kiselina koje imaju pozitivan efekat na zdravlje ljudi. Cilj ovog rada je bio da se ispita sadržaj masnih kiselina, vitamina A, C i α-tokoferola u mleku koje je dobijeno u različitim sistemima proizvodnje, organskom i konvencionalnom. Uzorci konvencionalnog i organskog mleka sakupljani su na farmama u Vojvodini tokom čitave godine. Analiza uzoraka je vršena primenom metoda gasne hromatografije i tečne hromatografije. Rezultati su pokazali da je mleko proizvedeno po principima organske proizvodnje tokom celog perioda praćenja imalo veći sadržaj polinezasićenih i omega-3 masnih kiselina u odnosu na konvencionalno mleko (p lt 0,01), s tim što su najveće razlike bile u sezoni paše. Sadržaj vitamina A, C i α -tokoferola bio je veći u organskom mleku od sadržaja u mleku iz konvencionalne proizvodnje, mada nije utvrđena statistička značajnost ovih razlika.",
publisher = "Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd",
journal = "Acta Veterinaria-Beograd",
title = "The effect of organic milk production on certain milk quality parameters, Efekat organske proizvodnje mleka na neke parametre kvaliteta mleka",
volume = "61",
number = "4",
pages = "415-421",
doi = "10.2298/AVB1104415P"
}

Popović-Vranješ, A., Savić, M., Pejanović, R., Jovanović, S.,& Krajinović, G.. (2011). The effect of organic milk production on certain milk quality parameters. in Acta Veterinaria-Beograd
Univerzitet u Beogradu - Fakultet veterinarske medicine, Beograd., 61(4), 415-421.
https://doi.org/10.2298/AVB1104415P

Popović-Vranješ A, Savić M, Pejanović R, Jovanović S, Krajinović G. The effect of organic milk production on certain milk quality parameters. in Acta Veterinaria-Beograd. 2011;61(4):415-421.
doi:10.2298/AVB1104415P .

Popović-Vranješ, Anka, Savić, Mila, Pejanović, R., Jovanović, S., Krajinović, G., "The effect of organic milk production on certain milk quality parameters" in Acta Veterinaria-Beograd, 61, no. 4 (2011):415-421,
https://doi.org/10.2298/AVB1104415P . .