1. C. S. G. Ekemar, S. A. O. Iggstrom and G. K. A. Heden. Influence of some metallurgical parameters of cemented carbides on the sensitivity to thermal fatigue cracking at cutting edges, Iron and Steel Institute, Publn. 126, p. 133 (1970).
2. Stora Special Steels. Stora A.S.P. high-speed steels, Product information September 1972, p. 5, 1972.
3. E. Lardner. Review of current hardmetal technology, Iron and Steel Institute, Publn. 126, p. 122, 1970.
4. H. M. Westergaard. Bearing pressures and cracks, J. Appl. Mech. (1939) 6, A-49.
5. G. R. Irwin. Crack extension force for a part through crack in a plate, J. Appl. Mech. (1962) 84, E-651.