1. Inequalities in Mechanics and Physics;Duvaut,1976
2. An Introduction to Variational Inequalities and Their Applications;Kinderlehrer,1980
3. Lectures on Numerical Methods for Nonlinear Variational Problems;Glowinski,1980
4. The free boundary for elastic-plastic torsion problems;Caffarelli;Trans. Amer. Math. Soc.,1979
5. Numerical analysis of variational inequalities;Glowinski,1981