Rybakova, N. A.; Kiseleva, L. M.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1987 , vol. 36, # 4 p. 869 - 872
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1987 , # 4 p. 943 - 946