Kleine-Levin Syndrome Foundation
Features information about the rare sleep disorder. Also provides a support network for those involved with the disease.
Kleine-Levin Syndrome Information Page
National Institute of Neurological Disorders and Stroke (NINDS) presents information and links regarding the syndrome also known as Sleeping Beauty Sickness.
Brain - a Journal of Neurology at Oxford University offers a systematic review of 186 cases of Kleine-Levin syndrome found in literature.