1. Faculty of Management, Lublin University of Technology, 20-618 Lublin, Poland
2. Department of Marketing, Sumy State University, 40007 Sumy, Ukraine
3. Economic Cybernetics Department, Sumy State University, 40007 Sumy, Ukraine
4. Faculty of Public Administration and Business, WSEI University, 20-209 Lublin, Poland
5. Faculty of Economics and Management, West Ukrainian National University, 46027 Ternopil, Ukraine