@article{MZM_1980_27_3_a6,
     author = {V. A. Kofanov},
     title = {Best uniform approximation of differentiable functions by algebraic polynomials},
     journal = {Matemati\v{c}eskie zametki},
     pages = {381--390},
     publisher = {mathdoc},
     volume = {27},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1980_27_3_a6/}
}