Andriyanov, N. A.
Article History
Received: 14 April 2021
Revised: 14 April 2021
Accepted: 14 April 2021
First Online: 21 September 2021
COMPLIANCE WITH ETHICAL STANDARDS
: This article is a completely original work of the author, which has not been published previously and will not be published in other publications.
: The author states that he does not have a conflict of interest.