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- Butzer, Paul Leo, 1928- (2)
- Christoffel, Elwin Bruno, 1829-1900 (1)
- Conference on Linear Operators and Approximation (1)
- Fehér, F. (Franziska), 1942- (1)
- International Christoffel Symposium in Honour of Christoffel on the 150th Anniversary of His Birth (1)
- Kahane, Jean-Pierre, 1926- (1)
- Mathematisches Forschungsinstitut Oberwolfach (1)
- Szőkefalvi-Nagy, Béla, 1913- (1)