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@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/} }
G. G. Magaril-Il'yaev. On best approximation by splines of function classes on the line. Informatics and Automation, Investigations in the theory of differentiable functions of many variables and its applications. Part 14, Tome 194 (1992), pp. 148-159. http://geodesic.mathdoc.fr/item/TRSPY_1992_194_a9/