Gastro-oeasophageal reflux, oesophageal pH-metry and reflux oesophagitis in patients with Helicobacter pylori : Proceedings of the workshop Helicobacter pylori and the new concepts in gastro-duodenal diseases. Prague, Charles University, 30.-31.10. 1992.
Roč. 47, č. 2 (1993), s. 101.
N. Pehlivanov, L. Boyanova, A. Mihova, S. Petrov