Ohayon MM, Roth T (juli 2002). ”Prevalence of restless legs syndrome and periodic limb movement disorder in the general population”. Journal of Psychosomatic Research (Elsevier BV) 53 (1): sid. 547–54. doi:10.1016/s0022-3999(02)00443-9. PMID 12127170.
Hornyak M, Trenkwalder C (maj 2004). ”Restless legs syndrome and periodic limb movement disorder in the elderly”. Journal of Psychosomatic Research (Elsevier BV) 56 (5): sid. 543–8. doi:10.1016/s0022-3999(04)00020-0. PMID 15172211.
Ohayon MM, Roth T (juli 2002). ”Prevalence of restless legs syndrome and periodic limb movement disorder in the general population”. Journal of Psychosomatic Research (Elsevier BV) 53 (1): sid. 547–54. doi:10.1016/s0022-3999(02)00443-9. PMID 12127170.
Hornyak M, Trenkwalder C (maj 2004). ”Restless legs syndrome and periodic limb movement disorder in the elderly”. Journal of Psychosomatic Research (Elsevier BV) 56 (5): sid. 543–8. doi:10.1016/s0022-3999(04)00020-0. PMID 15172211.