P. Ekström, L. Carling, S. Wetterhus, P. E. Wingren, O. Anker-Hansen, G. Lundegårdh, E. Thorhallsson, P. Unge,
Prevention of Peptic Ulcer and Dyspeptic Symptoms with Omeprazole in Patients Receiving Continuous Non-Steroidal Anti-Inflammatory Drug Therapy: A Nordic Multicentre Study Scandinavian Journal of Gastroenterology. ,vol. 31, pp. 753- 758 ,(1996) ,
10.3109/00365529609010347