Matveev, S. A.
Korotkov, E. B.
Slobodzyan, N. S.
Zhukov, Yu. A.
Kiselev, A. A.
Article History
Received: 18 March 2020
Revised: 29 April 2020
Accepted: 30 April 2020
First Online: 16 September 2020
Change Date: 9 November 2020
Change Type: Update
Change Details: The TeX presentation of formulas was updated in HTML file.
Change Date: 3 December 2020
Change Type: Erratum
Change Details: An Erratum to this paper has been published:
Change Details: https://doi.org/10.3103/S1068799820030253