Headaches Related to Sexual Activity
JNNP 39:1226, Lance,J.W., 1976
Diagnosis and Management of Motor Neurone Disease
BMJ 336:658-662, McDermott,C.J. &Shaw,P.J., 2008
Complicated Migraine
In Handbook of Clinical Neuro. , Ed. Vinken & Bruyn-5:Chap 6 N. Holland Pub. Co., Bruyn,G.W., 1968