@article{MZM_1980_28_2_a3,
     author = {Yu. N. Subbotin},
     title = {One-sided spline approximation with additional restrictions, and the reconstruction of functions and derivatives},
     journal = {Matemati\v{c}eskie zametki},
     pages = {223--238},
     publisher = {mathdoc},
     volume = {28},
     number = {2},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1980_28_2_a3/}
}