- Principles of Cost Accounting
- Linear Operators and Approximation I: Proceedings Conference Math. Res. Institute, Oberwolfach (International Series of Numerical Mathematics)
- Linear Operators and Approximation / Lineare Operatoren Und Approximation: Proceedings of the Conference Held at the Oberwolfach Mathematical Research Institute, Black Forest, August 14 22, 1971 / Abh
- Linear Operators and Approximation II / Lineare Operatoren Und Approximation II: Proceedings of the Conference Held at the Oberwolfach Mathematical Research Institute, Black Forest, March 30 April 6,
- Topics in Modern Operator Theory: 5th International Conference on Operator Theory, Timi Oara and Herculane (Romania), June 2 12, 1980