University of Novi Sad,
Faculty of Technical Sciences,
Trg Dositeja Obradovića 6,
21000 Novi Sad
Republic of Serbia
e-mail: nikolavuk@uns.ac.rs
University of Novi Sad,
Faculty of Technical Sciences,
Trg Dositeja Obradovića 6,
21000 Novi Sad
Republic of Serbia
e-mail: stevan.cveticanin@uns.ac.rs