Maykop ShapovalovMaksimI.Adyghe State University, 208 Pervomayskaya St., Maykop 385000, Russiashapmaksim2017@yandex.ru Read more about Shapovalov Maksim I. SadykovRomanK.Adyghe State University, 208 Pervomayskaya St., Maykop 385000, RussiaScirtes@mail.ru Read more about Sadykov Roman K.