1. E. Gervais, H. Levert, and M. Bess: AFS Trans., 1980, vol. 88, pp. 183–94.
2. M. Sahoo, L.V. Whiting, and W.G. Whited: AFS Trans., 1985, vol. 93, pp. 475–80.
3. D. Delneuville: Wear, 1985, vol. 105, pp. 283–92.
4. R.J. Barnhurst and E. Gervais: AFS Trans., 1985, vol. 93, pp. 591–602.
5. P. Sriram, S. Seshan, and H. Md. Roshan: AFS Trans., 1992, vol. 109, pp. 769–75.