O. V. Voronova
Peter the Great St. Petersburg Polytechnic University
Russian Federation

Ol'ga V. Voronova, Ph.D. in Economics, Associate Professor, Associate Professor of the Graduate School of Service and Trade of the Institute of Industrial Management, Economics and Trade

29 Politekhnicheskaya Str., St. Petersburg 195251

I. V. Il’in
Peter the Great St. Petersburg Polytechnic University
Russian Federation

Igor' V. Il'in, D.Sci., Ph.D. in Economics, Professor, Director of the Graduate School of Service and Trade of the Institute of Industrial Management, Economics and Trade

29 Politekhnicheskaya Str., St. Petersburg 195251

V. A. Sheleyko
Peter the Great St. Petersburg Polytechnic University
Russian Federation

Viktoriya A. Sheleyko, Assistant of the Graduate School of Service and Trade of the Institute of Industrial Management, Economics and Trade

29 Politekhnicheskaya Str., St. Petersburg 195251