Vinokurov, V. A.; Polivin, Yu. N.; Silin, M. A.; Ageev, E. A.; Zatikyan, M. A.; Karakhanov, R. A. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1989 , vol. 38, # 2 p. 1984 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1989 , vol. 9, p. 2154 - 2155