Sleep and Wakefulness Out of Phase with Internal Biological Time Impairs Learning in Humans. - Kenneth P. Wright Jr.; Joseph T. Hull; Rod J. Hughes; Joseph M. Ronda; Charles A. Czeisler (J. Cogn. Neurosci., 2006)

Blue Light Stimulates Cognitive Brain Activity in Visually Blind Individuals. - Gilles Vandewalle; Olivier Collignon; Joseph T. Hull; Véronique Daneault; Geneviève Albouy; Franco Lepore; Christophe Phillips; Julien Doyon; Charles A. Czeisler; Marie Dumont; Steven W. Lockley; Julie Carrier (J. Cogn. Neurosci., 2013)