1. Andrei I., Costea N.: Nonlinear hemivariational inequalities and applications to nonsmooth Mechanics. Adv. Nonlinear Variat. Inequal. 13(1), 1–17 (2010)
2. Berger M.: Nonlinearity and Functional Analysis. Academic Press, New York (1977)
3. Brezis H.: Analyse Fonctionnelle: Théorie et Applications. Masson, Paris (1992)
4. Browder F.E.: Nonlinear maximal monotone operators in Banach space. Math. Ann. 175, 89–113 (1968)
5. Clarke F.H.: Optimization and Nonsmooth Analysis. Wiley, New York (1983)