See also: K.L. Zarembo, V.I. Zakharov, M.A. Shifman, A.Yu. Morozov, A.A. Migdal
PACS: 02.10.Sp, 11.15.-q, 11.25.-w, 11.15.Ha, 12.38.Gc, 12.20.Ds, 11.30.Ly, 12.38.Aw