Prokopiev, I. A.
Filippova, G. V.
Article History
Received: 30 January 2020
Revised: 24 March 2020
Accepted: 21 April 2020
First Online: 18 October 2020
COMPLIANCE WITH ETHICAL STANDARDS
: This article does not contain any research involving humans or animals as research objects.
: The authors declare that they have no conflict of interest.