1. Baiocchi, C., Capelo, A.: Variational and Quasivariational Inequalities: Applications to Free-Boundary Problems. Wiley, Chichester (1984)
2. Barboteu, M., Han, W., Migórski, S.: On numerical approximation of a variational–hemivariational inequality modeling contact problems for locking materials. Comput. Math. Appl., submitted for publication
3. Advances in Mechanics and Mathematics;A. Capatina,2014
4. Clarke, F.H.: Optimization and Nonsmooth Analysis. Wiley, New York (1983)
5. Demengel, F., Suquet, P.: On locking materials. Acta Appl. Math. 6, 185–211 (1986)