@article{MZM_1999_66_3_a0,
     author = {A. V. Andrianov},
     title = {Approximation of $MH_q^r$-class functions by {Haar} polynomials},
     journal = {Matemati\v{c}eskie zametki},
     pages = {323--335},
     publisher = {mathdoc},
     volume = {66},
     number = {3},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1999_66_3_a0/}
}