Author(s):
1. Slavica Sladojević, Republic of Srpska, Bosnia and Herzegovina
2. Dragana Kešelj, Republic of Srpska, Bosnia and Herzegovina
3. Jelena Penavin-Škundrić, Prirodno-matematički fakultet Banja Luka, Republic of Srpska, Bosnia and Herzegovina
4. Gordana Ostojic, Republic of Srpska, Bosnia and Herzegovina

Applied paper from author