1. L. F. Porter: U.S. Steel Research Laboratory Bulletin, ADUSS 16-6919-02, Monroeville, PA, 1976.
2. J. E. Croll:BHP Tech. Bull., 1976, vol. 20, p. 24.
3. D. H. Skinner and M. Toyama:Weld. Res. Counc. Bull., 1977, vol. 232, p. 1.
4. T. J. Baker and J. A. Charles: Special Report 145, p. 79, Iron and Steel Institute-London, 1971.
5. G. R. Wilms:J. Aust. Inst. Met., 1973, vol. 18, p. 47.