1. D. R. Adams, and, S. Lenhart, An Obstacle Control Problem with a Source Term, preprint.
2. Optimal control of the obstacle for an elliptic variational inequality;Adams;Appl. Math. Optim.,1998
3. Variational and Quasivariational Inequalities;Baiocchi,1984
4. Pontryagin maximum principle for optimal control of variational inequalities;Bergounioux;SIAM J. Control Optim.,1999
5. Analysis and Control of Nonlinear Infinite Dimensional Systems;Barbu,1993