Institution: | 1.North-Ossetian State University named after K. L. Khetagurov,Vladikavkaz,Russia;2.Southern Mathematical Institute Vladikavkaz Scientific Center of the Russian Academy of Sciences,Vladikavkaz,Russia;3.V. A. Steklov Mathematical Institute of Russian Academy of Sciences,Moscow,Russia;4.L. D. Landau Institute of Theoretial Physics of Russian Academy of Sciences,Chernogolovka, Moscow Obl.,Russia |