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3. On the enlargement of voids in triaxial stress field;Rice;J. Mech. Phys. Solids,1974
4. On the mechanics of ductile fracture in high strength steels subjected to multiaxial states of stress;Hancock;J. Mech. Phys. Solids,1977
5. Constraint and toughness parameterised by T;Hancock,1993