J. S. Arnestad

Marked increase in gastric acid secretory capacity after omeprazole treatment.

A. Sandvik, H. Waldum, A. Sandvik, 1996, Gut.

Treatment with proton pump inhibitors induces tolerance to histamine-2 receptor antagonists in Helicobacter pylori-negative patients.

G. Qvigstad, H. Waldum, E. Brenna, 1998, Scandinavian journal of gastroenterology.

In single doses ranitidine effervescent is more effective than lansoprazole in decreasing gastric acidity

H. Waldum, P. M. Kleveland, H. L. Waldum, 1997, Alimentary pharmacology & therapeutics.