American Academy of Neurology - An article entitled: Not a brain tumor: serious headaches explained. www.eurekalert.org/pub_releases/2000-12/AAoN-Nabt-2512100.php
Spontaneous Intracranial Hypotension - A discussion about this disorder, its features, causes, diagnosis and treatment. medmic02.wnmeds.ac.nz/groups/rmo/headache/headache16.html
