1. Kyiv National Economic University named after Vadym Hetman , Faculty of Marketing, Department of Marketing named after A. F. Pavlenko , Peremoga Avenue, building 54/1, of. 333 Kyiv , Ukraine ;
2. National University of Life and Environmental Sciences of Ukraine , Faculty of Agricultural Management, Department of Marketing and International Trade , Heroiv Oborony Str.11 building 10, of. 401 Kyiv , Ukraine ;
3. Institute of Engineering Thermophysics of National Academy of Sciences of Ukraine , Department of Heat-Physical Problems of Heat Supply Systems , Marii Kapnist (Zheliabova) Str. 2A, building 1, office 116 , Kyiv , Ukraine ;
4. State University of Telecommunications, Educational and Scientific Institute of Management and Entrepreneurship , Department of Entrepreneurship, Trade and Stock Exchange . Solomianska str. 7 , Kyiv , Ukraine ;
5. Department of Public Administration and Law Dmytro Motornyi Tavria State Agrotechnological University 18 B. Khmelnytsky Ave, Melitopol, Zaporizhzhia obl . Ukraine ;
6. Abu Dhabi University , Abu Dhabi , United Arab Emirates ;
7. Department of Tourism and Hotel-Restaurant Business Chair, Economical Department , Kamianets-Podіlskyi National Ivan Ohiienko University , Ohiienko st., 61, Kamianets-Podіlskyi , Ukraine .
8. Eastern European State College of Higher Education in Przemyśl, Książąt Lubomirskich 6 , 37-700 Przemyśl , Poland ,