Karasik, A. A.; Erastov, O. A.; Arbuzov, B. A. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1988 , vol. 37, # 10 p. 2172 - 2174 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1988 , # 10 p. 2409 - 2411