See also: I.I. Soloviev, V.A. Vozhakov, A.A. Zhukov, A.M. Satanin, N.V. Klenov, D.V. Babukhin, W.V. Pogosov
PACS: 03.67.Lx, 03.75.Lm, 42.50.Dv, 85.25.Cp