1. Aubin, J. P. (1993). Optima and equilibria Springer Verlag, Berlin.
2. Aubin, P. and Frankowska, H. (1991). Set—valued analysis Birkhäuser, Berlin-Heidelberg.
3. Baiant, Z. P. and Cedolin, L. (1991). Stability of structures. Elastic, inelastic, fracture and damage theories Oxford University Press, New York, Oxford.
4. Bertsekas, D. P. (1982). Constrained optimization and Lagrange multiplier methods Academic Press, New York.
5. Bolzon, G., Ghilotti, D., and Maier, G. (1997). Parameter identification of the cohesive crack model. In Sol, H. and Oomens, C., editors, Material identification using mixed numerical experimental methods, pages 213-222, Dordrecht. Kluwer Academic Publishers.