- Minimax Theorems & Qualitative Properties of the Solutions of Hemivariational Inequalities
- Quasidifferentiability and Nonsmooth Modelling in Mechanics, Engineering and Economics (Nonconvex Optimization and Its Applications)
- Inequality Problems in Mechanics and Applications
- The Boundary Integral Approach to Static and Dynamic Contact Problems: Equality and Inequality Methods
- The Boundary Integral Approach to Static and Dynamic Contact Problems: Equality and Inequality Methods (International Series of Numerical Mathematics)