@article{GDZPPN001171208,
title = {A Note on Polynomial Splines with Free Knots.},
journal = {Numerische Mathematik},
volume = {21},
year = {1973},
pages = {181-184},
zbl = {0265.65006},
url = {http://dml.mathdoc.fr/item/GDZPPN001171208}
}
Wulbert, Daniel. A Note on Polynomial Splines with Free Knots.. Numerische Mathematik, Tome 21 (1973) pp. 181-184. http://gdmltest.u-ga.fr/item/GDZPPN001171208/