See also: B.M. Smirnov, Ya.A. Smorodinskii, D.S. Chernavskii, A.P. Silin, E.G. Maksimov, T.O. Vreden-Kobetskaya
PACS: 87.50.Mn, 01.30.Cc, 01.30.Vv, 87.15.Mi, 87.15.Rn, 87.16.-b, 87.40.+w