Barnaul NesterovVitaliyI. Altai State Pedagogical University, Altai region, Barnaul, Molodezhnaya str., 55 nesterov.email@yandex.ru Read more about Nesterov Vitaliy I. EkshibarovaOlgaVladimirovna Altai State Pedagogical University, Altai region, Barnaul, Molodezhnaya str., 55 ooosestra@gmail.com Read more about Ekshibarova Olga Vladimirovna
