Dragutin Lj. Debeljkovic

Department of Control Eng., University of Belgrade, School of Mechanical Engineering, Belgrade, Serbia

Sreten B. Stojanovic

Faculty of Technology, University of Nis, Serbia

Goran V. Simeunovic

University of Belgrade, School of Mechanical Engineering, Innovation Centre, Belgrade, Serbia

Nebojsa J. Dimitrijevic

Department of Control Eng., University of Belgrade, School of Mechanical Engineering, Belgrade, Serbia