S. I. Rylin
St. Petersburg University of Management Technologies and Economics
Russian Federation

Sergey I. Rylin, postgraduate student

44A Lermontovskiy Ave., St. Petersburg 190020

T. N. Kosheleva
St. Petersburg University of Management Technologies and Economics; St. Petersburg State University of Civil Aviation named after Chief Marshal of Aviation A.A. Novikov
Russian Federation

Tatiana N. Kosheleva, D.Sc. in Economics, Associate Professor, Correspondent Member of the IHEAS, Professor at the Department of Management of Socio-Economic Systems; Head of the Department of Socio-Economic Disciplines and Service

44A Lermontovskiy Ave., St. Petersburg 190020

38 Pilotov st., St. Petersburg 196210