Mikhailov,B.M.; Ter-Sarkisyan,G.S.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1960 , p. 1175 - 1178
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1960 , # 7 p. 1267 - 1271