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2. R.G. Becher, R.G. Canning, B.A. Goodheart, and S. Uusna: Proc. AusIMM, 1965, vol. 214, pp. 21–44.
3. P. Schwartzkopf and R. Kieffer: Refractory Hard Metals: Borides, Carbides, Nitrides and Silicides, Macmillan, New York, NY, 1953.
4. E.K. Storms: The Refractory Carbides, Academic Press, New York, NY, 1967, pp. 1–17.
5. P. Schwartzkopf and R. Kieffer: Cemented Carbides, Macmillan, New York, NY, 1960.