Nefedova, L. N.
Article History
Received: 14 February 2020
Revised: 26 February 2020
Accepted: 29 February 2020
First Online: 1 September 2020
COMPLIANCE WITH ETHICAL STANDARDS
: The author declares that there is no conflict of interest.
: This article does not contain any studies performed by the author with the participation of people or the use of animals as objects.