See also: D.D. Sokolov, P.G. Frick
PACS: 47.27.er, 95.75.-z, 47.65.Md, 95.85.Sz, 98.35.Eg, 07.55.Db, 41.20.-q, 91.25.-r, 96.12.Hg, 96.60.Hv