See also: N.G. Tatalashvili, V.L. Ginzburg, Yu.M. Shabel’skii, I.M. Dremin, E.L. Feinberg, G.A. Askar’yan, A.V. Gurevich, Yu.V. Kopaev, V.V. Usov, A.K. Murtazaev, S.I. Nikol’skii, A.A. Komar, P.S. Kop’ev
PACS: 01.10.Fv, 13.85.Fb, 13.85.Hd