Hypnic Headache, Clinical Features, Pathophysiology, and Treatment
Neurol 60:905-909, Evers,S.&Goadsby,P.J., 2003
Unilateral Hypnic Headache:A Case Study
Neurol 49:1749-1751, Gould,J.D.&Silberstein,S.D., 1997
The Hypnic Headache Syndrome:A Benign Headache Disorder of the Elderly
Neurol 40:194-195, Newman,L.C.,et al, 1990