Baeva, L. A.
Nugumanov, R. M.
Biktasheva, L. F.
Safiullin, R. L.
Article History
Received: 31 October 2019
Revised: 31 October 2019
Accepted: 7 November 2019
First Online: 20 June 2020
CONFLICT OF INTEREST
: No conflict of interest was declared by the authors.