1. International Classification of Sleep Disorders: Diagnostic and Coding Manual;American Academy of Sleep Medicine Diagnostic Classification Steering Committee,2005
2. NIH State-of-the-Science Conference. NIH State-of-the-Science Conference Statement on Manifestations and Management of Chronic Insomnia in Adults. NIH State-of-the-Science Conference 2005 June 13–15 [cited; Available from: http://consensus.nih.gov/2005/2005InsomniaSOS026html.htm
3. A community-based study of sleep disorders in patients with Parkinson's disease;Tandberg;Mov Disord,1998
4. Sleep disorders in Parkinson's disease;Kumar;Mov Disord,2002
5. Sleep disorders in patients with Parkinson's disease: epidemiology and management;Larsen;CNS Drugs,2001