V.P. Ivanov, A.E. Lomovskiсh, V.V. Illarionov, V. V. Tatarinov
O.V. Shindor, E.S. Denisov, Yu.K. Evdokimov
E.V. Semina - Post-graduate Student, Department of Applied Mathematics, Moscow State University of Eco-nomics, Statistics and Informatics. E-mail: semina_elisaveta@mail.ru