Author(s):
1. Mersida Manjgo,
Federation of Bosnia and Herzegovina
, Bosnia and Herzegovina
2. Tomaž Vuherer, Fakulteta za strojnštvo, Univerza v Mariboru, Slovenia
3. Meri Burzić, Mašinski fakultet Univerziteta u Beogradu, Serbia
4. Eldar Pirić, Rudarski fakultet,
Federation of Bosnia and Herzegovina
, Bosnia and Herzegovina