1. Nonconvex energy functions, hemivariational inequalities and substationary principles;Panagiotopoulos;Acta Mech.,1983
2. Hemivariational Inequalities, Applications in Mechanics and Engineering;Panagiotopoulos,1993
3. Mathematical Theory of Hemivariational Inequalities and Applications;Naniewicz,1995
4. Minimax Theorems and Qualitative Properties of the Solutions of Hemivariational Inequalities and Applications;Motreanu,1999
5. Nonsmooth Variational Problems and their Inequalities: Comparison Principles and Applications;Carl,2007