@article{DAN_1962_145_3_a9,
     author = {N. P. Korneichuk},
     title = {The exact constant in {D.~Jackson{\textquoteright}s} theorem on best uniform approximation of continuous periodic functions},
     journal = {Doklady Akademii Nauk},
     pages = {514--515},
     publisher = {mathdoc},
     volume = {145},
     number = {3},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_145_3_a9/}
}