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Authors
Andreev, Viktor K.
Stepanova, Irina V.
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Funding
Funding for this research was provided by:
Ministry of Science and Higher Education of the Russian Federation in the framework of the establishment and development of regional Centers for Mathematics Research and Education (Agreement No. 075-02-2020-1631)
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Article History
Accepted: 27 October 2020
First Online: 5 November 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
