1. Stress intensity factors at the tips of kinked and forked cracks;Bilby,1978
2. British Standards Institution (1977). BS 5447 : 1977. Methods of test for plane strain fracture toughness (KIc) of metallic materials. British Standards Institution, London.
3. The stress field in the neighborhood of branched crack in an infinite elastic solid;Chatterjee;Int. J. Solids Struct.,1975
4. Notes on the paths and stability of cracks;Cotterell;Int. J. fract. Mech.,1966
5. On the crack extension in plates under plane loading and transverse shear;Erdogan;J. bas. Engng,1963