1. A.K. Ghosh, S.S. Hecker, and S.P. Keeler: inWorkability Testing Techniques, G.E. Dieter, ed., ASM, Metals Park, OH, 1984, pp. 125–95.
2. S.P. Keeler: SAE Paper No. 650535, 1965.
3. G.M. Goodwin: SAE Paper No. 680093, 1968.
4. A.K. Ghosh:Met. Eng. Q., 1975, vol. 15, pp. 63–64.
5. R.A. Ayres, W.G. Brazier, and V.F. Sajewski:J. Appl. Metalwork., 1979, vol. 1, pp. 73–82.