See also: Ya.A. Smorodinskii, P.S. Isaev, B.M. Smirnov, A.P. Silin, A.N. Matveev, S.M. Zhebrovskii, T.O. Vreden-Kobetskaya
PACS: 01.30.Vv, 01.70.+w, 03.70.+k