1. Capacity for prolonged exercise in man;Ahlborg;Försvarsmedicin,1967
2. Treatment of hemicrania (migraine) by removal of the inferior cervical and first thoracic sympathetic ganglion;Dandy;Bull. Johns Hopk. Hosp.,1931
3. Nitroglycerin as a provocative agent in cluster headache;Ekbom;Arch. Neurol.,1968
4. Carotid angiography in cluster headache;Ekbom;Acta radiol. (Stockh.),1970