Malenkov, A. G.
Article History
Received: 20 May 2020
Revised: 20 May 2020
Accepted: 27 May 2020
First Online: 27 August 2021
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests</i>. The author declares that he has no conflict of interest.
: <i>Statement on the welfare of humans or animals</i>. This article does not contain any studies involving animals performed by any of the authors.