1) Sahota RK, Dexter JD:Sleep and Headache Syndromes;A Clinical Review. Headache 30:80-84, 1990
2) American Academy of Sleep Medicine:Sleep related headaches, International Classification of Sleep Disorders(2nd ed);Diagnosis & Coding Manual, American Academy of Sleep Medicine, pp236-238, Westchester, 2005
3) Jennum P, Jensen R:Sleep and headache. Sleep Med Rev 6:471-479, 2002
4) Headache Classification Committee of the International Headache Society:The International Classification of Headache Disorders, 2nd ed. Cephalalgia 24[Suppl 1]:1-160, 2004
5) Manzoni GC, Torelli P:Headache screening and diagnosis. Neurol Sci 25:255-257, 2004