Maykop KuevaEllaM. Maikop State Technological University, 191 Pervomayskaya St., Maykop 385000, Russiaelka_kem@meta.ua Read more about Kueva Ella M. SiiukhovaAminetM. Maikop State Technological University, 191 Pervomayskaya St., Maykop 385000, Russiaaminsi@mail.ru Read more about Siiukhova Aminet M.