Authors
Pavel Rušeljuk
Tallinn University of Technology, Tallinn, Estonia
Narva, Estonia
Nebojša Lukić
University of Kragujevac, Serbia
Kertu Lepiksaar
Tallinn University of Technology, Tallinn, Estonia
Novak Nikolić
University of Kragujevac, Serbia
Aleksandar Nešović
University of Kragujevac, Serbia
Andres Siirde
Tallinn University of Technology, Tallinn, Estonia