1. Kazakhstan Branch of Lomonosov Moscow State University, Nur-Sultan
2. Institute of Mathematics and Mathematical Modeling, Ministry of Education and Science, Republic of Kazakhstan, Almaty
3. Institute for Information Transmission Problems of the Russian Academy of Sciences (Kharkevich Institute), Moscow
4. Lomonosov Moscow State University
5. Institute of Mathematics with Computing Centre, Ufa Federal Research Centre, Russian Academy of Sciences, Ufa