1. A. J. Kennedy:Processes of Creep and Fatigue in Metals, John Wiley and Sons, Inc., New York, 1963.
2. A. H. Meleka:Met. Rev., 1962, vol. 7, no. 25, p. 43.
3. E. G. Ellison:J. Mech. Eng. Sci., 1969, vol. 11, p. 318.
4. D. Shetty and M. Meshii: Northwestern Univ., unpublished research, 1974.
5. B. J. Lazan:Proc. ASTM, 1949, vol. 49, p. 757.