Kabachnik, M. I.; Zakharov, L. S.; Goryunov, E. I.; Kudryavtsev, I. Yu. Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1989 , vol. 38, # 7.2 p. 1522 - 1526 Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1989 , # 7 p. 1660 - 1664