Howard P. Roffwarg. Diagnostic classification of sleep and arousal disorders. 1979 first edition. Association of Sleep Disorders Centers and the Association for the Psychophysiological Study of Sleep.. Sleep. 1979, 2 (1): 1–154. PMID 531417. doi:10.1093/sleep/2.1.1.
Howard P. Roffwarg. Diagnostic classification of sleep and arousal disorders. 1979 first edition. Association of Sleep Disorders Centers and the Association for the Psychophysiological Study of Sleep.. Sleep. 1979, 2 (1): 1–154. PMID 531417. doi:10.1093/sleep/2.1.1.