Florent Krzakala Andrea Montanari Federico Ricci-Tersenghi Guilhem Semerjian Lenka Zdeborová Gibbs States and the Set of Solutions of Random Constraint Satisfaction Problems http://arxiv.org/abs/cond-mat/0612365 2006 CoRR abs/cond-mat/0612365 db/journals/corr/corr0612.html#abs-cond-mat-0612365 informal publication