Chemistry and Biology of Pteridines : Pteridines and Folic Acid Derivatives. Proceedings of the International Symposium on Pteridines and Folic Acid Derivatives, Chemical, Biological and Clinical Aspects. . 5, : University of Konstanz, West Germany, April 14-18, 1975
Vitamin B12 : Proceedings of the 3rd European Symposium on Vitamin B12 and Intrinsic Factor, University of Zurich, March 5-8, 1979, Zurich, Switzerland
Chemistry and Biology of Pteridines : Pteridines and Folic Acid Derivatives. Proceedings of the International Symposium on Pteridines and Folic Acid Derivatives, Chemical, Biological and Clinical Aspects. . 7, : St. Andrews, Scotland, September 21-24, 1982