- Conference on Functional Analysis (3)
- Bierstedt, Klaus-Dieter (2)
- Fuchssteiner, B. (2)
- Butković, Davor, 1935- (1)
- Hoffmann-Jørgensen, J. (Jørgen), 1929- (1)
- Interuniverzitetski centar za postdiplomski studij (Dubrovnik, Croatia) (1)
- Kraljević, Hrvoje, 1944- (1)
- Kurepa, Svetozar, 1929- (1)
- Universität-Gesamthochschule Paderborn (1)