1. Curnier, A. (ed.) 1992:Proceedings contact mechanics international symposium. Lausanne: Presses Polytechniques et Universitaires Romandes
2. Del Piero, G.; Maceri, F. (eds.) 1985:Unilateral problems in structural analysis. Vienna: Springer
3. Del Piero, G.; Maceri, F. (eds.) 1987:Unilateral problems in structural analysis - 2. Vienna: Springer
4. Del Piero, G.; Maceri, F. (eds.) 1991:Unilateral problems in structural analysis - IV. International Series of Numerical Mathematics29. Basel: Birkhäuser
5. Duvaut, D.; Lions, J.L. 1976:Inequalities in mechanics and physics. Berlin, Heidelberg, New York: Springer