1.
- Highlights of gastroenterology in the Netherlands, 1991 : proceedings of a symposium, 25-28 April 1991, Algarve, Portugal / edit. C. B. H. W. Lamers, C. A. Sumajow. 1991. Vol. 26, Suppl. 188 - Oslo : Universitetsforlaget, 1991 - 126 s.(Scandinavian Journal of Gastroenterology; Suppl. 188) [1, currently available 0, at library only 1]
- Chapters, articles