@article{MZM_2003_73_5_a15,
     author = {A. I. Kozko and A. V. Rozhdestvenskii},
     title = {On {Jackson's} {Inequality} for {Generalized} {Moduli} of {Continuity}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {783--788},
     year = {2003},
     volume = {73},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_73_5_a15/}
}