Idrisova, Valeriya http://orcid.org/0000-0002-3013-5446
Funding for this research was provided by:
Russian Foundation for Basic Research (17-41-543364)
Russian Ministry of Science and Education under the 5-100 Excellence Program
Regional Mathematical Center of Novosibirsk State University
Russian Foundation for Basic Research (18-07-01394)
The program of fundamental scientific researches of the SB RAS no. I.5.1. (0314-2016-0017)
Article History
Received: 29 October 2017
Accepted: 27 April 2018
First Online: 11 May 2018