%0 Journal Article %A V. G. Doronin %A A. A. Ligun %T Upper bounds for the best one-sided approximation by splines of the classes $W^rL_1$ %J Matematičeskie zametki %D 1976 %P 11-17 %V 19 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1976_19_1_a1/ %G ru %F MZM_1976_19_1_a1