Author(s):
1. Milan Sljivic, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina
2. Dejan Đurđević, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
3. Nataša Šljivić, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
4. Jovica Ilić, Faculty of Mechanical Engineering, Republic of Srpska, Bosnia and Herzegovina