See also: B.M. Smirnov, E.B. Aleksandrov, V.S. Letokhov, I.M. Beterov, A.G. Sitenko, A.E. Kazakov
PACS: 52.25.Os, 52.80.Mg, 33.55.Be, 52.80.Wq, 32.50.+d, 52.25.Jm