Title: Variational and Non-variational Methods in Nonlinear Analysis and Boundary Value Problems / Edition 1, Author: Dumitru Motreanu
Title: Nonsmooth Equations in Optimization: Regularity, Calculus, Methods and Applications / Edition 1, Author: Diethard Klatte
Title: Equilibrium Problems: Nonsmooth Optimization and Variational Inequality Models / Edition 1, Author: F. Giannessi
Title: Equilibrium Problems and Variational Models / Edition 1, Author: P. Daniele