%0 Journal Article %A D. BRAESS %T Chebyshev Approximation by Spline Functions with Free Knots. %J Numerische Mathematik %D 1971 %P 357-366 %V 17 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1971__17_132082/ %F NUMA_1971__17_132082