Del'tsova,D.P. et al.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1971 , vol. 20, p. 296 - 299
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1971 , vol. 20, p. 362 - 366

Del'tsova,D.P. et al.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1971 , vol. 20, p. 296 - 299
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1971 , vol. 20, p. 362 - 366