@article{10_21136_AM_1992_104498, author = {Kobza, Ji\v{r}{\'\i}}, title = {Quadratic splines smoothing the first derivatives}, journal = {Applications of Mathematics}, pages = {149--156}, year = {1992}, volume = {37}, number = {2}, doi = {10.21136/AM.1992.104498}, mrnumber = {1149164}, zbl = {0757.65006}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1992.104498/} }