1. Optimal Control of Variational Inequalities;Barbu,1983
2. Analysis and Control of Nonliner Infinite Dimensional Systems;Barbu,1993
3. Analysis of a phase field model of a free boundry;Caginalp;Arch. Ration. Mech. Anal.,1996
4. Quelques Méthodes de Resolution Des Problm̀es Aux Limites Non Linéaires;Lions,1969
5. Existence for a time dependent rainfall infiltration model with a blowing up diffusivity;Barbu;Nonlinear Anal. Real World Appl.,2004