Ubelis, A. P.; Silinish, Yu. A. Opt. Spectrosc. (USSR), 1975 , vol. 38, p. 270 - 273 Opt. Spektroskopiya, 1975 , vol. 38, p. 479 - 485 Full Text Show Details Gmelin Handbook: Se: SVol.A3, 17.1, page 230 - 230