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1Livre
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2
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3
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4par Linear operators and approximation -- Conférence
Birkhäuser 1974Livre -
5par Linear spaces and approximation -- Conference
Birkhäuser 1978Livre -
6par International Christoffel Symposium in Honour of Christoffel on the 150th Anniversary of His Birth
Birkhäuser Verlag 1981Livre -
7par Linear operators and approximation -- Conférence
Birkhäuser 1972Livre