Martynov, I. V.; Ivanov, A. N.; Epishina, T. A.; Sokolov, V. B. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1987 , vol. 36, p. 1001 - 1003 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1987 , vol. 36, # 5 p. 1086 - 1089