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3. D. E. Diesburg and C. Kim, “Impact and Fatigue Fracture of Carburized Cases Related to Fracture Toughness and Residual Stress,” Proceedings of the 1981 Heat Treaters Conference in Wiesbaden, West Germany, October 1981.
4. O. H. Fuchs and R. I. Stephens, Metal Fatigue in Engineering, Wiley, 1980, p. 301.
5. H. Tada, P. Paris, and G. Irwin, The Stress Analysis of Cracks Handbook, 2.27, DEL Research Corp., 1973.