Francisco Dias
The School of Tourism and Maritime Technology at the Polytechnic Institute of Leiria, Portugal
Russian Federation

Antonina N. Tret'yakova
Moscow State Institute for the Industry of Tourism n. a. Yu.A. Senkevich
Russian Federation

Tamer Atef
Sultan Qaboos University - Sultanate of Oman; University of Sadat City - Egypt.
Russian Federation

Joanna Kosmaczewska
Department of Tourism Economics and Organization of the Poznan University School of Physical Education, Poland
Russian Federation

Regina Navickiene
Lithuanian Sport University, Lithuania
Russian Federation