Poteryaeva, O. N.
Usynin, I. F.
Article History
Received: 22 November 2019
Revised: 20 April 2020
Accepted: 29 April 2020
First Online: 27 February 2021
COMPLIANCE WITH ETHICAL STANDARDS
: This article does not contain any research involving humans or the use of animals as objects.
: The authors declare that they have no conflicts of intere-st.