1. Chugaev, L.A., Zh. Rus. Fiz.-Khim. Obshch., 1905, vol. 37, no. 2, p. 243.
2. Chugaev, L.A., Izbrannye trudy (Selected Works), Chernyaev, I.I., Ed., Moscow Izd-vo AN SSSR, vol. 1, 1954.
3. Rockenbaur, A., Eyor, M., Kwielinsci, M., and Tyrlik, S., Inorg. Chim. Acta, 1982, vol. 58, p. 237.
4. Matkovskii, K.L. and Bologa, O.A., Globus Nauki, 2006, vol. 6, p. 34.
5. Voloshin, Ya.Z., Varzatskii, O.A., and Bubnov, Yu.N., Izv. Akad. Nauk, Ser. Khim., 2007, no. 4, p. 555.