@article{TRSPY_1992_194_a9,
     author = {G. G. Magaril-Il'yaev},
     title = {On best approximation by splines of function classes on the line},
     journal = {Informatics and Automation},
     pages = {148--159},
     publisher = {mathdoc},
     volume = {194},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1992_194_a9/}
}