E.M. Roginskii - Dr. Sc. (Phys.-Math.), Senior Researcher, Ioffe Institute RAS, Saint-Petersburg. E-mail: e.roginskii@mail.ioffe.ru А.С. Крылов - Dr. Sc. (Phys.-Math.), Professor, Senior Researcher, L.V. Kirensky Institute of Physics SB RAS, Krasnoyarsk. E-mail: shusy@iph.krasn.ru Yu.F. Markov - Dr. Sc. (Phys.-Math.), Professor, Senior Researcher, Ioffe Institute RAS, Saint-Petersburg. E-mail: Yu.Markov@mail.ioffe.ru