About the Authors

O. Yaremko

Penza State University, str. Lermontov, 37, 440038, Penza, Russia

N. Yaremko

Penza State University, str. Lermontov, 37, 440038, Penza, Russia

T. Eliseeva

Penza State University, str. Lermontov, 37, 440038, Penza, Russia

Corresponding Author

Email: yaremki@mail.ru