Diagnosis and Management of Migraine
BMJ 312:1279-1283, Goadsby,P.J.&Olesen,J., 1996
Randomised Double-Blind Trial of Intravenous Fentanyl in Neuropathic Pain
Lancet 349:753-758, Dellemijn,P.L.I.&Vanneste,J.A.L., 1997
Cancer Pain:Management
Lancet 339:1031-1036, Hanks,G.W.&Justins,D.M., 1992
Emergency Treatment of Headache
Neurol 42 (Suppl 2) :43-44992., Rapoport,A.M.&Silberstein,S.D., 1992