@article{GDZPPN001170937,
title = {Singular Splines.},
journal = {Numerische Mathematik},
volume = {19},
year = {1972},
pages = {342-349},
zbl = {0241.65014},
url = {http://dml.mathdoc.fr/item/GDZPPN001170937}
}
Chan, Paula P. Singular Splines.. Numerische Mathematik, Tome 19 (1972) pp. 342-349. http://gdmltest.u-ga.fr/item/GDZPPN001170937/