Author(s):
1. Darko Divnić, Akademija nauka i umjetnosti Republike Srpske, Republic of Srpska, Bosnia and Herzegovina
2. Dragoljub Mirjanić, Akademija nauka i umjetnosti Republike Srpske, Republic of Srpska, Bosnia and Herzegovina
3. Esad Jakupović, Academy of Sciences and Arts of the Republic of Srpska, Bana Lazarevića 1, 78000 Banja Luka, Republi, Republic of Srpska, Bosnia and Herzegovina
4. Zoran Avramović, University od Belgrade, Serbia
5. Tomislav Pavlović, University of Nis, Faculty of Sciences and Mathematics, , Serbia
6. Ivana Radonjić Mitić, University of Nis, Faculty of Sciences and Mathematics, , Serbia

Abstract