Kasatkin, A. N.; Kulak, A. N.; Tolstikov, G. A.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1986 , vol. 35, # 11 p. 2314 - 2318
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1986 , # 11 p. 2527 - 2531