Nikonov, G. N.; Balueva, A. S.; Erastov, O. A.; Arbuzov, B. A.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1989 , vol. 38, # 6.2 p. 1223 - 1226
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1989 , # 6 p. 1340 - 1343