1. Barrett, C. S., Trans. Am. Inst. Min. Engrs, 1940, 137, 296; Barrett, C. S. and Levenson, H., Trans. Am. Inst. Min. Engrs, 1940, 137, 327
2. Kuhlmann-Wilsdorf, D., in Work Hardening in Tension and Fatigue, ed. A. W. Thompson. AIME, New York, 1977, p. 1
3. Theory of plastic deformation: - properties of low energy dislocation structures