Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), , vol. 38, # 11.1 p. 2229 - 2233
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, , # 11 p. 2428 - 2433
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), , vol. 35, # 11 p. 2364 - 2366
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, , # 11 p. 2578 - 2580