1. Well posedness of the fundamental boundary value problems for constrained anisotropic elastic materials;Arnold;Archs ration Mech. Analysis,1987
2. On the existence, uniqueness and the approximation of saddle point problems arising from Langrangian multipliers;Brezzi;RAIRO Analysis Num.,1974
3. Inequalities in Mechanics and Physics;Duvaut,1976
4. Convex Analysis and Variational Problems;Ekeland,1976
5. Boundary value problems in elasticity with unilateral constraints;Fichera;Handbuch der Physik,1972