@article{GDZPPN001183923,
title = {A Dual Algorithm for Convex-Concave Data Smoothing by Cubic C2-Splines.},
journal = {Numerische Mathematik},
volume = {58},
year = {1990},
pages = {333-350},
zbl = {0702.65017},
url = {http://dml.mathdoc.fr/item/GDZPPN001183923}
}
Schmidt, Jochen W.; Scholz, Isa. A Dual Algorithm for Convex-Concave Data Smoothing by Cubic C2-Splines.. Numerische Mathematik, Tome 58 (1990) pp. 333-350. http://gdmltest.u-ga.fr/item/GDZPPN001183923/