Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), , vol. 37, p. 2285 - 2289
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, , # 11 p. 2534 - 2538
Abdulkina, Z. A.; Amriev, R. A.; Velichko, F. K.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1981 , vol. 30, # 12 p. 2347 - 2349
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1981 , # 12 p. 2815 - 2818