Volov, V. T.
Article History
Received: 20 December 2019
Revised: 18 January 2021
Accepted: 22 January 2021
First Online: 27 August 2021
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests</i>. The authors declare that they have no conflicts 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.