Learned material content and acquisition level modulate cerebral reactivation during posttraining rapid-eye-movements sleep. - Philippe Peigneux; Steven Laureys; Sonia Fuchs; Arnaud Destrebecqz; Fabienne Collette; Xavier Delbeuck; Christophe Phillips; Joel Aerts; Guy Del Fiore; Christian Degueldre; André Luxen; Axel Cleeremans; et al. (NeuroImage, 2003)