@article{GDZPPN001169777, title = {Chebyshev Approximation by Spline Functions with Free Knots.}, journal = {Numerische Mathematik}, volume = {18}, year = {1971}, pages = {357-366}, zbl = {0227.65010}, url = {http://dml.mathdoc.fr/item/GDZPPN001169777} }
BRAESS, D. Chebyshev Approximation by Spline Functions with Free Knots.. Numerische Mathematik, Tome 18 (1971) pp. 357-366. http://gdmltest.u-ga.fr/item/GDZPPN001169777/