Leonid Melnyk
Department of Economics, Entrepreneurship and Business Administration, Sumy State University, 40007 Sumy,
Ukraine

László Vasa
Faculty of Economics, Széchenyi Istvan University, Győr,
Hungary

Satyanand Singh
Department of Electronics, Ins. & Control Engineering, College of Engineering and TVET, Fiji National University,
Fiji

Oleksandr Kubatko
Department of Economics, Entrepreneurship and Business Administration, Sumy State University, 40007 Sumy,
Ukraine

Lyudmila Kalinichenko
Department of Economics and Management, V.N. Karazin Kharkiv National University, Kharkiv, 61022,
Ukraine