See also: M.B. Voloshin, A.I. Golutvin, M.V. Danilov, M.A. Shifman
PACS: 13.25.Hw, 14.40.Nd, 11.30.Er, 12.10.-g, 14.65.Fy, 12.38.Aw, 14.40.Gx, 13.25.Gv, 11.55.Hx