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. Mirko Petković, Rafinerija ulja Modriča, Republic of Srpska, Bosnia and Herzegovina
4. Pero Dugić, Republic of Srpska, Bosnia and Herzegovina
5. Novak Damjanović, Republic of Srpska, Bosnia and Herzegovina