@article{MZM_1976_20_3_a13,
     author = {V. G. Doronin and A. A. Ligun},
     title = {Precise values of the best one-sided approximations by splines},
     journal = {Matemati\v{c}eskie zametki},
     pages = {417--424},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1976_20_3_a13/}
}