Nonlinear Differential Problems with Smooth and Nonsmooth Constraints Dumitru Motreanu E-Book (epub)

Topological and Variational Methods with Applications to Nonlinear Boundary Value Problems Dumitru Motreanu, Viorica Venera Motreanu, Nikolaos Papageorgiou E-Book (pdf)

Variational and Hemivariational Inequalities - Theory, Methods and Applications D. Goeleven, Dumitru Motreanu E-Book (pdf)