Radoslav Delina
(1), Mária Michňová
(2), Peter Húska
(3), Ján Spišák
(4)
(1)
Technical University of Kosice
Faculty of Economics, Slovakia,
(2)
University of Economics in Bratislava
Faculty of Business Economy, Slovakia,
(3)
University of Economics in Bratislava
Faculty of Business Economy, Slovakia,
(4)
Technical University of Kosice
Faculty of Mining, Ecology, Process Control and Geotechnologies, Slovakia