Bukharov,V.G.; Pozdnyakova,T.E.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1960 , # 6 p. 1031 - 1035
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1960 , # 6 p. 1108 - 1113