1. Willis T. The London Practice of Physick. London, Bassett, Dring, Harper, and Crook, 1692.
2. Restless legs: A clinical study;Ekbom;Acta Med Scand Suppl,1945
3. Restless legs syndrome;Ekbom;Neurology,1960
4. A double-blind, placebo-controlled study of the treatment of periodic limb movements in sleep using carbidopa/levodopa and propoxyphene;Kaplan;Sleep,1993
5. Treatment of restless legs syndrome with tramadol: An open study;Lauerma;J Clin Psychiatry,1999