1. Samara National Research University, Moskovskoe sh. 34A, Samara, 443086, Russia. E-mails: amskh@yandex.ru, pervitskiy.alex@mail.ru, seargeb@gmail.com
2. Lucerne University of Applied Science and Arts, Hochschule Luzern-Wirtschaft, Zentralstrasse 9, Luzern, Switzerland. E-mail: mariia.astrakhantceva@hslu.ch
3. Southern Federal University, pr. Stachki, 200/1, Rostov-on-Don, 344090, Russia. E-mail: baa@sfedu.ru