Pickard, et al.. 5ht1breceptor Agonists Inhibit Light-induced Phase Shifts of Behavioral Circadian Rhythms and Expression of the Immediate–early Genec-fosin the Suprachiasmatic Nucleus. no. 24, Society for Neuroscience, Dec. 1996, doi:10.1523/jneurosci.16-24-08208.1996.