See also: B.M. Smirnov, Ya.A. Smorodinskii, A.P. Silin, E.V. Shpol’skii, T.O. Vreden-Kobetskaya, E.G. Maksimov
PACS: 61.66.Hq, 01.30.Vv, 61.50.Ah, 61.10.-i, 81.10.Dn, 78.20.Ci