The work of I A Bizyaev (section 4 and appendix B) was supported by the Russian Science Foundation (project 18-71-0110). The work of A V Borisov (section 1) was supported by the RFBR Grant No. 18-29-10051 mk and was carried out at MIPT under project 5-100 for state support for leading universities of the Russian Federation. The work of I S Mamaev (section 4) was supported by the Russian Science Foundation (project 15-12-20035).
Received: 17.07.2018 Accepted: 03.05.2019
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