1. Doctor in Economics, Department of Economics, Entrepreneurship and Business Administration, Sumy State University
2. Ph.D., Faculty of Management, Rzeszów University of Technology
3. Ph.D. in Economics, Department of Economics, Entrepreneurship and Business Administration, Sumy State University
4. Ph.D., Faculty of Management and Economics of Services, University of Szczecin, Szczecin
5. Ph.D. Student, Department of Economics, Entrepreneurship and Business Administration, Sumy State University