- "2011 National Institutes of Health Sleep Disorders Research Plan"
- National Center on Sleep Disorders Research
- Sleep Studies (Health Topics)
- Updated NIH Sleep Disorders Research Plan Seeks To Promote and Protect Sleep Health (National Institutes of Health News Release, November 2011)
- "Your Guide to Healthy Sleep"
- Sleep and Sleep Disorders Fact Sheets (Centers for Disease Control and Prevention)
- Sleep Disorders (MedlinePlus)