Marko Cirovic, Dragana Makajic-Nikolic, Natasa Petrovic,
Mirko Vujosevic, Marija Kuzmanovic
University of Belgrade, Faculty of Organizational Sciences, Belgrade, Serbia
Submission date: 2014-03-05
Final revision date: 2014-05-09
Acceptance date: 2014-05-09
Publication date: 2015-02-06
Pol. J. Environ. Stud. 2015;24(1):75–81