1. C. W. Briggs, Ed., Steel Castings Handbook, Steel Founders Society of America, 3rd Ed. (1960) 150.
2. Ibid 182.
3. Designing with High Strength Steel Castings, Climax Molybdenum Co., Ltd., N.Y. (1965) 151.
4. M. J. May, C. E. Nicholson and A. H. Priest, A new Approach to Subcritical Flaw Growth in Low Alloy Steels, I.S.I. (1968) 117.
5. J. Schijve, The Accumulation of Fatigue Damage in Aircraft Materials and Structures, AGARDograph No. 157, N.A.T.O. (1972).