Брянск

SobolevNikolai A. Bryansk State University named after academician I. G. Petrovsky, 14 Bezhitskaya St., Bryansk sobolev_nikolas@mail.ru

KugushevaAnastasia S. Bryansk State University named after academician I. G. Petrovsky, 14 Bezhitskaya St., Bryansk kugusheva@365.rsu.edu.ru

AverinovaElena A. Bryansk State University named after academician I. G. Petrovsky, 14 Bezhitskaya St., Bryansk elena_averi@mail.ru