Research for WFC

http://www.cehd.umn.edu/pubs/ResearchWorks/sleep.html

http://findarticles.com/p/articles/mi_m0EPF/is_25_98/ai_54561266/

http://www.pbs.org/wgbh/nova/sciencenow/3410/01.html

http://kidshealth.org/teen/expert/sleep/sleeping_late.html

http://www.npr.org/templates/story/story.php?storyId=6896471

http://www.nytimes.com/2008/01/14/opinion/14kalish.html?pagewanted=print

http://www.eurekalert.org/pub_releases/2008-06/aaos-swa050708.php