Degtyarev, G. I.
Meshchanov, A. S.
Article History
Received: 5 April 2017
Revised: 6 April 2017
Accepted: 7 April 2017
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/S1068799820030290