Lopatkina, M. E.
Lebedev, I. N.
Article History
Received: 6 May 2019
Revised: 13 June 2019
Accepted: 18 June 2019
First Online: 30 May 2020
COMPLIANCE WITH ETHICAL STANDARDS
: This study does not contain any research involving humans or animals as research objects.
: The authors declare that they have no conflict of interest.