Cluster Headache
BMJ 344:e2407, Nesbitt,A.D.,et al, 2012
Cluster Headache Sine Headache: Case Report
Neurol 55:451, Salvesen,R., 2000
Cluster Headache Syndrome
Postgrad Med 91:96-104, Marks,D.R.&Rapoport,A.M., 1992
Cluster Headache
Neurol 42 (Suppl 2) :22-31992., Mathew,N.T., 1992