See also: A.M. Zheltikov, O.A. Shustin, N.N. Sobolev, N.G. Basov, S.A. Akhmanov, E.M. Belenov, A.F. Suchkov, V.V. Sokovikov, I.A. Yakovlev, V.A. Danilychev
PACS: 42.55.Lt, 42.65.Re, 42.65.Ky, 42.65.Dr, 42.60.Jf, 42.72.Bj