1. J. R. Low, Jun., ?The Relation of Microstructure to Brittle Fracture?, in ?Relation of Properties to Microstructure? (ASM, Cleveland, 1954) p. 163; ?The Fracture of Metals?, in ?Progress in Materials Science? (1963); ?A Review of the Microstructural Aspects of Cleavage Fracture?, in ?Fracture? edited by B. L. Averbach, D. K. Felbeck, G. T. Hahn and D. A. Thomas (Wiley, New York, 1959) p. 68.
2. J. J. Gilman,Trans. Met. Soc. AIME 203 (1955) 1252.
3. Idem, ibid June 1958 p. 310.
4. J. R. Low, Jun.,Eng. Fract. Mech. 1 (1968) 47.
5. A. H. Cottrell, in ?Fracture? edited by B. L. Averbach, D. K. Felbeck, G. T. Hahn and D. A. Thomas (Wiley, New York, 1959) p. 20.