@article{GDZPPN002028417,
title = {On the Degree of Approximation by Spline Functions with Free Knots.},
journal = {Aequationes mathematicae},
volume = {13},
year = {1975},
pages = {80-81},
zbl = {0328.41012},
url = {http://dml.mathdoc.fr/item/GDZPPN002028417}
}
Braess, Dietrich. On the Degree of Approximation by Spline Functions with Free Knots.. Aequationes mathematicae, Tome 13 (1975) pp. 80-81. http://gdmltest.u-ga.fr/item/GDZPPN002028417/