© 2016 Publisher M.V.Lomonosov Moscow State University
Authors
Yu.E. D'yakov, S.Ya. Nikitin
Department of General Physics and Wave Processes, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
Department of General Physics and Wave Processes, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia