Аутори:
1. Srđan Preradović, Faculty of Natural Sciences and Mathematics, University of Tuzla ,
Republic of Srpska, Bosnia and Herzegovina
2. Dino Hasanagić, Faculty of Natural Sciences and Mathematics, University of Tuzla ,
Republic of Srpska, Bosnia and Herzegovina
3. Vesna Antić, Универзитет у Београду, Пољопривредни факултет, Serbia
4. Milica Balaban, Природно-математички факултет Бања Лука,
Republic of Srpska, Bosnia and Herzegovina