@article{MZM_2004_76_6_a1,
     author = {A. V. Bondarenko and A. V. Primak},
     title = {Negative {Results} in {Form-Preserving} {Approximation} of {Higher} {Order}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {812--823},
     publisher = {mathdoc},
     volume = {76},
     number = {6},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2004_76_6_a1/}
}