1. Department of Economics and Entrepreneurship, L.N. Gumilyov Eurasian National University, 010000 Astana, Kazakhstan
2. Faculty of Management, Lublin University of Technology, 20-618 Lublin, Poland
3. Institute of Economics and Finance, Warsaw University of Life Sciences, 02-787 Warszawa, Poland
4. Faculty of Mechanical Engineering, Lublin University of Technology, 20-618 Lublin, Poland