Владикавказ KantemirovaGalinaA. North Ossetian State University named after KL Khetagurov, Ul. Vatutina, 44-46, Vladikavkaz, Rep. North Ossetia - Alania, 362025Ulcantem.galina@yandex.ru Read more about Kantemirova Galina A. KesaevaR.E. North Ossetian State University named after KL Khetagurov, Ul. Vatutina, 44-46, Vladikavkaz, Rep. North Ossetia - Alania, 362025Ulsabanovz@mail.ru Read more about Kesaeva R. E. SabanovZ.M. North Ossetian State University. KL Khetagurova, Vladikavkaz, Vatutina str., 46, Vladikavkaz, Republic of North Ossetia-Alaniamse@osetia.ru Read more about Сабанов З. М.