1. G. Thomas:Iron, Steel, Int., 1973, vol. 46, p. 451.
2. C. M. Wayman:Metallography, 1975, vol. 8, pp. 105–30.
3. R. W. K. Honeycombe:Structure and Strength of Alloy Steels, Climax Molybdenum Company, London, 1975, pp. 32–33.
4. J. McMahon and G. Thomas:Proc. Third International Conference on Strength of Metals and Alloys, Inst. of Metals, London, 1973, vol. 1, pp. 180–84.
5. B. V. Narasimha Rao, R. W. Miller, and G. Thomas:Proc. 16th International Heat Treatment Conference, The Metals Society, London, 1976, pp. 75–85.