1. S. J. Noesen and H. A. Williams:Transactions, Fourth S.D.C.E. Die Casting Congress, 1966, vol. 4, paper no. 801.
2. I. B. Ham, H. Hopper, and W. R. Rumberger:Transactions, Fourth S.D.C.E. Die Casting Congress, 1966, vol. 4, paper no. 803.
3. C. W. Nelson:Transactions, Sixth S.D.C.E. Die Casting Congress, 1970, vol. 6, paper no. 63.
4. J. M. Samuels and A. B. Draper:Transactions, Eighth S.D.C.E. Die Casting Congress, 1975, vol. 8, paper no. G-T75-052.
5. J. C. Benedyk, D. J. Moracz, and J. F. Wallace:Transactions, Sixth S.D.C.E. Die Casting Congress, 1970, vol. 6, paper no. 111.