1.
- Highlights of gastroenterology in the Netherlands, 1990 : proceedings of a symposium, 19-22 April 1990, Crete, Greece / edit. C. B. H. W. Lamers, C. A. Sumajow. 1990. Vol. 25, Suppl. 178 - Oslo : Universitetsforlaget, 1990 - 121 s.(Scandinavian Journal of Gastroenterology; Suppl. 178) [1, currently available 0, at library only 1]
- Chapters, articles