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2. G. A. Roberts, J. C. Hamaker, Jr., and A. R. Johnson:Tool Steels, ASM, Metals Park, OH, 1962, chs. 11 and 12.
3. A. Rescalvo and B.L. Averbach:Metall. Trans. A, 1979, vol. 10A, pp. 1265–84.
4. H. Johansson and R. Sandstrom:Mat. Sci. and Eng., 1978, vol. 36, pp. 175–80.
5. K. Eriksson:Scand. J. Metall., 1973, vol. 2, no. 4, pp. 197–203.