Zemlianskykh, N. G.
Article History
Received: 10 October 2019
Revised: 28 October 2019
Accepted: 1 November 2019
First Online: 14 August 2020
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 animals</i>. This article does not contain any studies involving humans or animals as direct objects performed by the author.