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Author(s):
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, Univerzitet u Beogradu, Poljoprivredni fakultet, Serbia
4. Milica Balaban, Prirodno-matematički fakultet Banja Luka,
Republic of Srpska, Bosnia and Herzegovina
Applied paper from author