Nicolas Beldiceanu Mats Carlsson Emmanuel Poder New Filtering for the cumulative Constraint in the Context of Non-Overlapping Rectangles. 21-35 2008 CPAIOR http://dx.doi.org/10.1007/978-3-540-68155-7_5 conf/cpaior/2008 db/conf/cpaior/cpaior2008.html#BeldiceanuCP08