Ustiugova, A. S.
Afanasyeva, M. A.
Article History
Received: 2 March 2020
Revised: 18 March 2020
Accepted: 18 March 2020
First Online: 19 October 2020
COMPLIANCE WITH ETHICAL STANDARDS
: This study does not contain any research involving humans or animals as research objects.<i>Conflict of interest</i>. The authors declare they have no conflict of interest.
: Supplementary materials are available for this article at https://doi.org/10.1134/S0026893320040160 and are accessible for authorized users.