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Youssef HA، Youssef FA، Dening TR (مارس 1996). "Evidence for the existence of schizophrenia in medieval Islamic society". History of Psychiatry. ج. 7 ع. 25: 55–62. DOI:10.1177/0957154X9600702503. PMID:11609215. S2CID:44459712.
Dowbiggin، Ian (1996)، "Back to the future: Valentin Magnan, French Psychiatry, and The Classification of Mental Diseases, 1885-1925"، Social History of Medicine، ج. 9، ص. 383–408، DOI:10.1093/shm/9.3.383، PMID:11618728
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Youssef HA، Youssef FA، Dening TR (مارس 1996). "Evidence for the existence of schizophrenia in medieval Islamic society". History of Psychiatry. ج. 7 ع. 25: 55–62. DOI:10.1177/0957154X9600702503. PMID:11609215. S2CID:44459712.