1. Barbu V (1984) Optimal Control of Variational Inequalities. Pitman, London
2. Bends�e MP, Olhoff N, Soko?owski J (1985) Sensitivity analysis of problems of elasticity with unilateral constraints. J Structural Mech 13:201?222
3. Benedict R, Soko?owski J, Zolesio JP (1984) Shape optimization for contact problems. In: Thoft-Christensen P (ed) System Modelling and Optimization. Lecture Notes in Control and Information Sciences, vol 59. Springer-Verlag, Berlin, pp 790?799
4. Bermudez A, Saguez C (1987) Optimality conditions for optimal control problems of variational inequalities (to appear)
5. Chenais D (1975) On the existence of a solution in a domain identification problem. J Math Anal Appl 52:189?219