@article{GDZPPN001175319,
title = {Efficient L2 Approximation by Splines.},
journal = {Numerische Mathematik},
volume = {33},
year = {1979},
pages = {101-114},
zbl = {0442.41015},
url = {http://dml.mathdoc.fr/item/GDZPPN001175319}
}
Smith, P.W.; Barrow, D.L. Efficient L2 Approximation by Splines.. Numerische Mathematik, Tome 33 (1979) pp. 101-114. http://gdmltest.u-ga.fr/item/GDZPPN001175319/