See also: A.S. Rozhavskii, L.E. Gendenshtein, M.A. Shifman
PACS: 11.10.Lm, 11.30.Pb, 11.30.Rd, 12.20.-m, 73.43.Jn, 03.65.Fd, 04.60.-m, 02.20.Sv, 03.65.Ge, 21.30.Fe, 11.30.Qc