Yarullina, L. G.
Burkhanova, G. F.
Tsvetkov, V. O.
Article History
Received: 19 July 2019
Revised: 7 October 2019
Accepted: 9 October 2019
First Online: 15 May 2020
COMPLIANCE WITH ETHICAL STANDARDS
: This article does not contain any studies involving animals or human participants performed by any of the authors.
: The authors declare that they have no conflict of interests.