Recent Advances in Constraints 11th Annual ERCIM International Workshop on Constraint Solving and Constraint Logic Programming, CSCLP 2006 Caparica, Portugal, June 26-28, 2006 Revised Selected and Invited Papers - Azevedo, Francisco; Barahona, Pedro; Fages, Francois; Rossi, Francesca (Lecture Notes in Artificial Intelligence, 2007)