Pyatigorsk VlasenkoA. I. Pyatigorsk State Linguistic University , 9, Kalinina, Pyatigorsk, 357500, Stavropol region, Russia vlasenkoai@yandex.ru Read more about A. I. Vlasenko NaumovaTatiana Valentinovna Pyatigorsk State University, 9 Kalinina St., Pyatigorsk 357530, Russia 89187545401@yandex.ru Read more about Naumova Tatiana Valentinovna
