Russia

Shabrov Sergey Aleksandrovich Voronezh State University, Voronezh State University, Russia, 394006, Voronezh, Universitetskaya pl., 1 shabrov_s_a@info.vsu.ru

Fokina Nadezhda Petrovna Saratov State University 1, Saratov State University, Russia, 410012, Saratov, Astrahanskaya st., 83 FokinaNP.sgu@gmail.com

Tananko Igor' Evstaf'evich Saratov State University 1, Saratov State University, Russia, 410012, Saratov, Astrahanskaya st., 83 TanankoIE@info.sgu.ru

Sapunov Sergey Valerievich Institute of Applied Mathematics and Mechanics, Ukraine, 83114, Donetsk, R. Luxemburg st., 74 sapunov_sv@yahoo.com

Osipov Dmitrii Yur'evich Saratov State University 1, Saratov State University, Russia, 410012, Saratov, Astrahanskaya st., 83 st_hill@mail.ru

MangushevaIrinaPavlovna Saratov State University 1, Saratov State University, Russia, 410012, Saratov, Astrahanskaya st., 83 MangushevaIP@info.sgu.ru

Shilovskii Pavel Aleksandrovich Saratov State University 1, Saratov State University, Russia, 410012, Saratov, Astrahanskaya st., 83 ShilovskyPA@info.sgu.ru

Davidovich Mikhail Vladimirovich Saratov State University 1, Saratov State University, Russia, 410012, Saratov, Astrahanskaya st., 83 DavidovichMV@info.sgu.ru

Pristavko Vladislav Tarasovich Saint Petersburg State University, Russia, 199034, St. Petersburg, Universitetskaya nab., 7-9 pvt1@yandex.ru

Litvin Aleksei Yur'evich Saint Petersburg State University, Russia, 199034, St. Petersburg, Universitetskaya nab., 7-9 alybey@mail.ru

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