1. with A. Bellmann, W. Jung, K. Richter, Optimal Experimental Design (in German), Akademie-Verlag, Berlin, 1973.
2. Theory and Application of Optimal Experimental Design, Vol. I: Theory (in German), Akademie-Verlag, Berlin, 1977.
3. with W. Näther, Theory and Application of Optimal Experimental Design, Vol. II: Application (in German), Akademie-Verlag, Berlin, 1980.
4. with W. Näther, J. Pilz, Once more: Optimal experimental design for regression models, with discussion and rejoinder, Statistics 18 (1987) 171–217.
5. with W. Nagel, Parameter estimation in linear regression models with weak and fuzzy prior knowledge, Statistics 12 (1981) 297–305.