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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 Jakupovic,
Republic of Srpska, Bosnia and Herzegovina
4. Zoran Ž. Avramović, University od Belgrade, Serbia
5. Tomislav Pavlović, University of Nis, Faculty of Sciences and Mathematics, , Serbia
6. Ivana Radonjić, University of Nis, Faculty of Sciences and Mathematics, , Serbia
Abstract