Gromov, N. V.
Medvedeva, T. B.
Taran, O. P.
Timofeeva, M. N.
Parmon, V. N.
Article History
Received: 24 March 2020
Revised: 13 April 2020
Accepted: 15 April 2020
First Online: 14 May 2021
ADDITIONAL INFORMATION
: This paper was translated by the authors.