1. Variational principles and free-boundary problems;Friedman,1982
2. Partial differential equations of parabolic type;Frideman,1964
3. The Stefan problem;Rubinstein,1971
4. Variational and quasivariational inequalities;Baiocchi,1984
5. An evolution variational inequality related to a diffusion-absorption problem;Baiocchi;Appl Math Optim,1976