1. ABAQUS – HKS theory manual – Version 5.21
2. ABAQUS User's conference, Writing a (V) Umat, Aachen, 1993
3. M.A. Criesfield, Non Linear Finite Element Analysis of Solids and Structures, vol. 1, Wiley, New York, 1991
4. M. Cervenka, B. Bouchet, C. Gasc, Influence du mode de découpage sur le comportement en fatigue de tôles minces d'aciers dualphase Mémoires d'études scient, Revue de métallurgie, 1990, pp. 185–194
5. Fracture prediction in plastic deformation process;Clift;Int. J. Mech. Sci.,1990