@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/