See also: D.N. Bukharov, K.S. Khor’kov, A.V. Osipov, S.V. Zhirnova, A.O. Kucherik, S.M. Arakelyan, D.V. Abramov, S.V. Garnov
PACS: 61.48.-c, 79.20.Eb, 81.07.-b