1. N. Thompson and N.J. Wadsworth, Advances in Physics, 1958, 7, pp. 72–169.
2. D.H. Avery and W.A. Bockofen, Fracture of Solids, Edited by D.C. Drucker and J J. Gilman, J. Wiley and Sons, New York 1963, pp. 339–382.
3. C. Laird, “Influence of Metallurgical Structure on the Mechanism of Fatigue Crack Propagation’, A.S.T.M. 69th Annual Meeting, Atlantic City 1966. To be published in A.S.T.M. S.T.P. 415, 1967.
4. PJ.E. Forsyth, ‘A Two Stage Process of Fatigue Crack Growth’, Proc. of the Crack Propagation Symposium, Cranfield, 1961.
5. C. Laird and G.C. Smith, Phil. Mag., 1963, 8, pp. 1945–1963.