Volkov, I. M.
Kravtsova, A. S.
Article History
Received: 9 October 2019
Revised: 21 November 2019
Accepted: 22 November 2019
First Online: 31 March 2020
FUNDING
: This work was partially supported by a scholarship of Slovak Academic Information Agency SAIA, by RFBR grants 18-502-12025 and 11-02-01213a, RNF grant 14-12-00146. We appreciate the support from the Program of development of M.V. Lomonosov Moscow State University (Leading Scientific School “Physics of stars, relativistic objects and galaxies”).