See also: L.S. Alperovich, D. Shtivelman, A.M. Fridman, L. Shemer, A.G. Marchuk, D. Liberzon
PACS: 89.60.Gg, 91.30.Nw, 92.05.Bc, 92.05.Hj, 92.10.hl, 92.10.Hm