@article{MZM_1976_19_1_a1,
     author = {V. G. Doronin and A. A. Ligun},
     title = {Upper bounds for the best one-sided approximation by splines of the classes $W^rL_1$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {11--17},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1976_19_1_a1/}
}