@article{INTO_2021_196_a2,
     author = {V. I. Zorkal'tsev},
     title = {Chebyshev approximations do not need the {Haar} condition},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {28--35},
     publisher = {mathdoc},
     volume = {196},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2021_196_a2/}
}