Author(s):
1. Jelena Đurđić, Alumina doo, , Republic of Srpska, Bosnia and Herzegovina
2. Mladen Janković, lumina doo, Republic of Srpska, Bosnia and Herzegovina
3. Zoran Obrenovic, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
4. Vladimir Damjanovic, Alumina doo, , Republic of Srpska, Bosnia and Herzegovina
5. Željko Ostojić, Alumina doo, , Republic of Srpska, Bosnia and Herzegovina
6. Ljubomir Janković, Alumina doo, , Republic of Srpska, Bosnia and Herzegovina

Applied paper from author