This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Zoltán Bartha
Faculty of Economics, University of Miskolc, 3515 Miskolc-Egyetemváros, Hungary
Andrea S. Gubik
Faculty of Economics, University of Miskolc, 3515 Miskolc-Egyetemváros, Hungary