1. Silberstein SD, Silberstein MM. Clinical symptomatology and differential diagnosis of migraine. In: Tollison CD, Kunkel RS, eds. Headache: Diagnosis and Treatment. Baltimore: Urban and Schwarzenberg; 1993, pp. 59–75.
2. Critchley M. Migraine: from cappadocia to queen square. In: Smith R, ed. Background to Migraine, vol 1. London: Heinemann, 1967.
3. International Headache Society. Classification and diagnostic criteria for headache disorders, cranial neuralgias, and facial pain. Cephalalgia 1988;8:1–96.
4. Silberstein SD, Young WB. Headache and facial pain. In: Goetz CG, ed. Textbook of Clinical Neurology, 2nd ed. Philadelphia: Saunders; 2003, p. 1187.
5. Goldstein M, Chen TC. The epidemiology of disabling headache. Adv Neurol 1982;33:377–390.