Kostroma SamohvalovaA. G. Kostroma State University, 17, Dzerzhinsky Str., Kostroma, 156005, Russia samohvalova@kmtn.ru Read more about A. G. Samohvalova TabachenkoAndreyA. Kostroma State University, 17, Dzerzhinsky Str., Kostroma, 156005, Russia andrei.aat@yandex.ru Read more about Tabachenko Andrey A.