1. G. R. IRWIN: 'Structural mechanics: proceedings of the first symposium on naval structural mechanics', (ed. J. N. Goodier and N. J. Hoff), 557–591; 1960, New York, Pergamon.
2. J. R. RICE: 'Fracture: an advanced treatise', (ed. H. Liebowitz), Vol. 2, 192–314; 1968, New York, Academic Press.
3. Plastic stress and strain fields at a crack tip
4. J. R. HAIGH and C. E. RICHARDS: Proc. Conf. on 'Creep and fatigue in elevated temperature applications'; 1973, Phila-delphia, Pa, American Society of Mechanical Engineers.