1. I. M. Fedorchenko, in: Increasing the Wear Resistance and Service Life of Machines,-[in Russian], Vol. 3, Kiev (1966).
2. M. E. Belitskii, B. G. Ivanov, and B. V. Aryanin, Poroshkovaya Met., No. 5 (1966).
3. I. M. Fedorchenko, N. A. Filatova, and V. V. Pushkarev, Fiz.-Khim. Mekhan. Mater., No. 5, 567 (1965).
4. Chemist's Handbook, [in Russian], Vol. 2, Moscow (1964).
5. P. Pascal, Traite de Chimie Minerals, Vol. 4 (1953), p. 60.