1. Becker, H.D., Peiper, H.J.: Ulcus ventriculi. Stuttgart: Thieme 1977
2. Bonnevie, O.: Causes of death in duodenal and gastric ulcer. Gastroenterology 73, 1000(1977)
3. Christiansen, P., Amdrup, E., Fenger, C., Jensen, H.E., Lindskov, J., Nielsen, J., Damgaard-Nielsen, S. A.: Gastric ulcer. Non surgical treatment. Acta chir. scand. 139, 466 (1973)
4. Duthie, H.L., Moore, K.T.H., Bardsley, D., Clark, CG.: Surgical treatment of gastric ulcers. Brit. J. Surg. 57, 784 (1970)
5. Duthie, H. L.: Surgery for gastric ulcer. World J. Surg. 1, 29 (1977)