Yandovskii, V. N.; Gidaspov, B. V.; Telinskii, I. V. Doklady Chemistry, 1986 , vol. 289, p. 256 - 259 Dokl. Akad. Nauk SSSR Ser. Khim., 1986 , vol. 289, # 1 p. 120 - 123