1. F. H. BUTTNER, H. F. TAYLOR and J. WULFF, Amer. Foundryman Oct. (1951) 49.
2. J. KEVERIAN and H. F. TAYLOR, Trans. AFS 65 (1957) 212.
3. R. H. MCSWAIN and C. E. BATES, in Proceedings of the 2nd International Symposium on the Metallurgy of Cast Iron, (Geneva, 1974) p. 421.
4. G. T. VAN ROOYEN and G. PAUL, Metal Science 8 (1974) 370.
5. E. SELCUK, in Proceedings of the 2nd International Symposium on the Metallurgy of Cast Iron, (Geneva, 1974) p. 409.