Siling, S. A.; Ponomarev, I. I.; Kuznetsov, V. V.; Vinogradova, S. V.; Korshak, V. V. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1984 , vol. 33, p. 708 - 716 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1984 , # 4 p. 771 - 779