@article{MZM_1983_33_5_a8,
     author = {V. T. Shevaldin},
     title = {$\mathscr L${-Splines} and widths},
     journal = {Matemati\v{c}eskie zametki},
     pages = {735--744},
     year = {1983},
     volume = {33},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1983_33_5_a8/}
}