@article{MZM_1996_59_5_a4,
     author = {A. I. Ermakov},
     title = {Best {Hausdorff} approximations by algebraic polynomials and porosity},
     journal = {Matemati\v{c}eskie zametki},
     pages = {692--702},
     publisher = {mathdoc},
     volume = {59},
     number = {5},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1996_59_5_a4/}
}