Christian Bessière Remi Coletta Thierry Petit Learning Implied Global Constraints. 44-49 2007 conf/ijcai/2007 IJCAI http://dli.iiit.ac.in/ijcai/IJCAI-2007/PDF/IJCAI07-005.pdf db/conf/ijcai/ijcai2007.html#BessiereCP07