See also: N.B. Delone, A.M. Fedotov, V.D. Mur, V.S. Popov, B.M. Karnakov, V.P. Krainov
PACS: 41.75.Jv, 52.38.-r, 52.40.Mj, 03.65.Sq, 32.80.Fb, 32.80.Rm, 32.80.Wr, 34.80.Qb