@article{GDZPPN001181912, title = {An Algorithm for Computing Constrained Smoothing Spline Functions.}, journal = {Numerische Mathematik}, volume = {55}, year = {1987}, pages = {583-596}, zbl = {0622.41006}, url = {http://dml.mathdoc.fr/item/GDZPPN001181912} }
Elfving, Tommy; Andersson, Lars-Erik. An Algorithm for Computing Constrained Smoothing Spline Functions.. Numerische Mathematik, Tome 55 (1987) pp. 583-596. http://gdmltest.u-ga.fr/item/GDZPPN001181912/