1. Kudrow L. Cluster Headache, Mechanisms and Management. Oxford, O.U.P. 1980:10-12.
2. Chronic migrainous neuralgia;Pearce, J.M.S.;Brain,1980
3. Clinical comparison of cluster headache and migraine;Ekbom, K.;Acta Neurol Scand,1970
4. Migraine in patients with cluster headache;Anderson, P.G.;Cephalalgia,1985
5. Chronic paroxysmal hemicrania-case report of the second known definite occurrence in a male;Rapoport, A.M.; Sheftell, F.; Baskin, S.M.;Cephalalgia,1981