Goncharenko, V. I.
Oleshko, V. S.
Article History
Received: 2 March 2020
Revised: 28 April 2020
Accepted: 28 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/S1068799820030368