1. Nitroglycerin as a provocative agent in cluster headache;Ekbom;Arch. Neurol. (Chic.),1968
2. Kliniska studier vid Hortons syndrom. Transactions of the Swedish Neurological Society (Dec. 1967);Ekbom;Nord. Med.,1968
3. Prophylactic treatment of cluster headache with a new serotonin antagonist - BC 105;Ekbom;Acta neurol. scand.,1969
4. Circulatory and respiratory adaptation during prolonged exercise;Ekelund;Acta physiol. scand.,1967