1. R. Roscoe:Nature, 1934, vol. 111, p. 912.
2. E. S. Machlin:Strengthening Mechanisms in Solids, pp. 375–404, American Society for Metals, Cleveland, OH, 1962.
3. I. R. Kramer and L. J. Demer:Prog. Mater. Sci., 1961, vol. 9, p. 133.
4. A. R. C. Westwood:Environment Sensitive Mechanical Behavior, A. R. C. Westwood and N. S. Stoloff, eds., pp. 1–65, Gordon and Breach, New York, 1966.
5. P. N. Chaku and C. J. McMahon, Jr.:Met. Trans., 1974, vol. 5, p. 441.