Litvinov,V.P.; Gol'dfarb,Ya.L.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1963 , p. 2011 - 2018
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1963 , # 12 p. 2183 - 2192