1. G. S. Ansell and S. Weertman:Trans. TMS-AIME, 1959, vol. 215, p. 838.
2. I. R. McLauchlin:Creep Strength in Steel and High Temperature Alloys, p. 86. The Metals Society, London, 1974.
3. J. M. Adamson and J. W. Martin:Ibid, p. 106.
4. J. M. Silcox and G. Willoughby:Ibid, p. 122.
5. F. E. Asbury and G. Willoughby:Ibid, p. 144.