1. T. Bell,Heat Treatment of Metals 2 (1975) 39.
2. Idem, in ?Metals Handbook?, 9th edn. Vol. 4 (American Society for Metals, Metals Park, Ohio, 1981) pp. 264?69.
3. E. J. Mittemeijer, H. C. F. Rozendaal, P. F. Colijn, P. J. Van Der Schaaf andR. Th. Furnee, in ?Heat Treatment '81?, (The Metals Society, London, 1981).
4. P. F. Colijn, E. J. Mittemeijer andH. C. F. Rozendaal,Z. Metallkde. 74 (1983) 620.
5. A. Wells, PhD Thesis, University of Liverpool (1982).