Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), , vol. 36, # 8 p. 1693 - 1695
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, , # 8 p. 1826 - 1828
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), , vol. 32, # 4 p. 821 - 824
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, , # 4 p. 903 - 907