Lipetsk ZhukovskayaNataliaYurievna Lipetsk State Pedagogical P. Semenov-Tyan-Shansky University, 42, Lenin St., Lipetsk, 398020, Russia lgpu322@gmail.com Read more about Zhukovskaya Natalia Yurievna PozdnyakovSergeyN. Russian Academy of National Economy and Public Service under the President of the Russian Federation, Lipetsk branch, Lipetsk, St. International, 3 posn@br.ranepa.ru Read more about Pozdnyakov Sergey N. TselykovskyAlekseyAndreevich Lipetsk State Technical University, 398600, Russia, Lipetsk, ul. Moscow, 30 alts1085@mail.ru Read more about Tselykovsky Aleksey Andreevich Gliznutsin DmitryVladimirovich Lipetsk State Technical University, 398600, Russia, Lipetsk, ul. Moscow, 30 gliznutsin@list.ru Read more about Gliznutsin Dmitry Vladimirovich IvanovAndreyGennadievich Russian Academy of National Economy and Public Service under the President of the Russian Federation, Lipetsk branch, Lipetsk, St. International, 3 agivanov2@yandex.ru Read more about Ivanov Andrey Gennadievich BelyaevDmitriy Anatolevich Lipetsk State Pedagogical P. Semenov-Tyan-Shansky University, 42, Lenin St., Lipetsk, 398020, Russia dm.a.belyaev@gmail.com Read more about Belyaev Dmitriy Anatolevich
