1. Wittmann, F. H. (ed.), ‘Fracture Toughness and Fracture Energy of Concrete’ (Elsevier, Amsterdam, 1986).
2. Mihashi, H., Takahashi, H. and Wittmann, F. H. (eds), ‘Fracture Toughness and Fracture Energy: Test Methods for Concrete and Rock’ (Balkema, Rotterdam, 1989).
3. Hillerborg, A., ‘The theoretical basis of a method to determine the fracture energyG F of concrete’,Mater. Struct. 18(106) (1985) 291–296.
4. Elices, M. and Planas, J., ‘Material models’, in ‘Fracture Mechanics of Concrete Structures’ (Chapman and Hall, London, 1989) pp. 16–66.
5. Idem, Size effect and experimental validation of available fracture models’, in ‘Analysis of Concrete Structures by Fracture Mechanics’ (Chapman and Hall, London, 1990) pp. 99–127.