Shvartsberg, M. S.; Moroz, A. A.; Piskunov, A. V.; Budzinskaya, I. A.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1987 , vol. 36, # 11 p. 2338 - 2343
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1987 , # 11 p. 2517 - 2523