1. K. H. Jack:Heat Treatment ’73, Metals Soc., London, 1973, p. 39.
2. K. H. Jack:Scand. J. Met., 1972, vol. 1, pp. 195–202.
3. D. L. Speirs, W. Roberts, P. Grieveson, and K. H. Jack:Chemical Metallurgy in Iron and Steel, Iron and Steel Inst., London, 1973 pp. 371–73.
4. J. H. Driver, D. C. Unthank, and K.H. Jack:Phil. Mag., 1972, vol. 26, pp. 1227–31.
5. D. L. Speirs: Dissertation, University of Newcastle-Upon-Tyne, England, 1969.