Identification and Treatment of Cerebral Aneurysms After Sentinal HEadache
Neurol 42:1118-1119, Hughes,R.L., 1992
Severe Headaches, When to Worry, What To Do
Postgrad Med 83:164-180, Drexler,E.D., 1990
When the Headache is Ominous
Emerg Med Nov 1973, pp 87., Joynt,R., 1973