• Author: Beersma, D. G. M. Comas R. A. Hut M. C. Gordijn M. Rueger S. Daan
• Title: The progression of circadian phase during light exposure in animals and humans
• Year: 2009
• Reference Type: Journal Article
• Journal/Book Title: J. Biol. Rhythms
• Volume: 24
• Issue: 2
• Pages: 153-60
• Date of Publication: Sunday, 20 December 2009