1. L. Luyckx, J. R. Bell, A. McLean, and M. Korchynsky:Metall. Trans., 1970, vol. 1, pp. 3341–50.
2. E. J. Lichy, G. C. Duderstadt, and N. L. Samways:J. Metals, 1965, pp. 769–800.
3. B. N. Ferry and E. J. Paliwoda: SAE Preprint 74018, February 1974.
4. J. H. Bucher and E. G. Hamburg: SAE Preprint 770164, February 1977.
5. E. Waddington, R. M. Hobbs, and J. L. Duncan:J. Appl. Metalwork., 1980, vol. 1, no. 2, pp. 35–47.