See also: K.V. Karelsky, A.S. Petrosyan, A.A. Petrukovich, M.M. Mogilevskii, D.R. Shklyar
PACS: 94.20-ó, 94.30.-d, 47.27.E-, 47.27.ep, 47.27.Gs, 52.35.Ra, 52.65.Kj