A longitudinal assessment of sleep timing, circadian phase, and phase angle of entrainment across human adolescence
PLoS ONE (2014) - Comments
pubmed: 25380248  doi: 10.1371/journal.pone.0112199  issn: 1932-6203 

Stephanie J. Crowley, Eliza Van Reen, Monique K. LeBourgeois, Christine Acebo, Leila Tarokh, Ronald Seifer, David H. Barker, Mary A. Carskadon