Author(s):
1. Marica Dugić, Rafinerija ulja Modriča, Republic of Srpska, Bosnia and Herzegovina
2. Branko Despotović, Rafinerija ulja Modriča, Republic of Srpska, Bosnia and Herzegovina
3. Pero Dugić, Faculty of Technology Banja Luka, Republic of Srpska, Bosnia and Herzegovina

Abstract Paper for reviews Final paper