Christian Bessière Pedro Meseguer Eugene C. Freuder Javier Larrosa On forward checking for non-binary constraint satisfaction. 205-224 2002 141 Artif. Intell. 1/2 db/journals/ai/ai141.html#BessiereMFL02 http://dx.doi.org/10.1016/S0004-3702(02)00263-1