1. A comparison of two different doses of omeprazole versus ranitidine in treatment of duodenal ulcers;Bardhan;J Clin Gastroenterol,1986
2. Omeprazole heals duodenal and prepyloric ulcers faster than cimetidine-a single centre trial;Gustavsson;Gastroenterology,1987
3. A double blind multicentre comparison of omeprazole and cimetidine in the management of duodenal ulcer;Hetzel;Aust NZ J Med,1986
4. Omeprazole vs ranitidine for duodenal ulcer-one week low dose regimens and factors affecting healing;Hui;Gastroenterology,1987
5. Effect of omeprazole and cimetidine on duodenal ulcer;Lauritson;N Engl J Med,1985