Kugatova-Shemyakina,G.P.; Lutsenko,V.V.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1964 , p. 1339 - 1344
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1964 , p. 1429 - 1436