Christian Bessière Jean-Charles Régin Roland H. C. Yap Yuanlin Zhang An optimal coarse-grained arc consistency algorithm. 165-185 2005 165 Artif. Intell. 2 http://dx.doi.org/10.1016/j.artint.2005.02.004 db/journals/ai/ai165.html#BessiereRYZ05