Dural Puncture and Headache, Avoid the First but Treat the Second
BMJ 306:874-876, Reynolds,F., 1993
Bilateral Tentorial Subdural Hematoma without Subarachnoid Hemorrhage Secondary to Anterior Communicating Artery Aneurysm Rupture
AJNR 25:1006-1007, Krishnaney, A.A.,et al, 2004