Волгоград MakarenkoKirillM. Volgograd State University, 400062, Volgograd region, Volgograd, University Avenue, 100makarenko_km@volsu.ru Read more about Makarenko Kirill M. ChernyaevEvgeniyK. Volgograd State University, 400062, Volgograd region, Volgograd, University Avenue, 100bktaga@yandex.ru Read more about Chernyaev Evgeniy K. МоiseevaDar’ja V. Volgograd State University, 400062, Volgograd region, Volgograd, University Avenue, 100moiseeva-d@yandex.ru Read more about Моiseeva Dar’ja V. DulinaNadezhda V. Volgograd State University, 400062, Volgograd region, Volgograd, University Avenue, 100nv-dulina@volsu.ru Read more about Dulina Nadezhda V. KolotilinaA.A. Volgograd State University, 400062, Volgograd region, Volgograd, University Avenue, 100missn@list.ru Read more about Колотилина А. А. EvstifeevaO.G. Volgograd Branch of the Plekhanov Russian University of Economics, 400131, Volgograd, Volgodonsk str., 11satha@inbox.ru Read more about Евстифеева О. Г. SukiasyanA.Kh. Volgograd Branch of the Plekhanov Russian University of Economics, 400131, Volgograd, Volgodonsk str., 11satha@inbox.ru Read more about Сукиасян А. Х.