Belgorod GaragulyaSergeyIvanovich Belgorod State Technological University named after V.G. Shukhov, 308012, Russia, Belgorod, Kostyukova st., 46 garagulya@mail.ru Read more about Garagulya Sergey Ivanovich NikitinaMargaritaYuryevna Belgorod State Technological University named after V.G. Shukhov, 308012, Russia, Belgorod, Kostyukova st., 46 ritanikitina@mail.ru Read more about Nikitina Margarita Yuryevna ShemaevaElenaViktorovna Belgorod State University, Russia, 308015, Belgorod, Pobedy street, 85 eshemaeva@yandex.ru Read more about Shemaeva Elena Viktorovna