Bera Oskar, University of Novi Sad, Faculty of Technology Novi Sad, Novi Sad, Serbia. email: obera@uns.ac.rs Volume 1, No. 1, May 2019.

Bauk Sanja, University of Montenegro, Kotor; Faculty of Technology, Durban, Južna Afrika. Volume 1, No. 1, May 2019.

Jelena Pavličević, University of Novi Sad, Faculty of Technology Novi Sad, Blvd cara Lazara 1, 21000 Novi Sad, Serbia, jpavlicevic@uns.ac.rs Volume 1, No. 1, May 2019.