by Sviridova, L. A., Tavtorkin, A. N., Shalynina, N. A., Vorozhtsov, N. I., Protopopova, P. S., Urmambetova, Zh. S., Kochetkov, K. A.
Published in Russian chemical bulletin (01.05.2015)

by Kochetkov, K. A., Urmambetova, Zh. S., Belikov, V. M., Bakasova, Z. B.
Published in Bulletin of the Academy of Sciences of the USSR Division of Chemical Science (01.11.1990)