Claude-Guy Quimper Alexander Golynski Alejandro López-Ortiz Peter van Beek An Efficient Bounds Consistency Algorithm for the Global Cardinality Constraint. 115-135 2005 10 Constraints 2 http://dx.doi.org/10.1007/s10601-005-0552-y db/journals/constraints/constraints10.html#QuimperGLB05