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Author(s):
1. Rade Biočanin, Državni univerzitet u Novom Pazaru, Novi Pazar, Serbia
2. Slađana Mirjanić, Prirodno-matematički fakultet, Univerzitet u Banjoj Luci,
Republic of Srpska, Bosnia and Herzegovina
3. Dražen Sarjanović, Sara-Mont. Doo,, Serbia
4. Mubina Čolaković, Internacionalni univerzitet Travnik,
Federation of Bosnia and Herzegovina
, Bosnia and Herzegovina