1. L.G. Voroshnin, L.S. Lyakhovich, Borirovaniye stali, Metallurgiya, Moskwa, 1978 (in Russian).
2. Surface treatment;Kunst,1991
3. A.K. Sinha (Ed.), Metals Handbook, ASM International, Metals Park, OH, 1982, p. 844.
4. Constitution of Binary Alloys;Hansen,1958