Author(s):
1. Meldina Kokorović Jukan,
Federation of Bosnia and Herzegovina
, Bosnia and Herzegovina
2. Bahrija Umihanić, Prirodno-matematički fakultet Banja Luka,
Federation of Bosnia and Herzegovina
, Bosnia and Herzegovina
3. Amra Nuhanovic, Faculty of Economics University of Tuzla ,
Federation of Bosnia and Herzegovina
, Bosnia and Herzegovina