Kryshtal',G.V.; Khusid,A.Kh.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1979 , vol. 28, p. 2203 - 2205
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1979 , vol. 28, # 10 p. 2381 - 2383