Nikishin, G. I.; Spektor, S. S.; Kapustina, N. I.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 5 p. 931 - 934
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , # 5 p. 1172 - 1175