@article{TIMM_2012_18_4_a4,
     author = {A. G. Babenko and N. V. Dolmatova and Yu. V. Kryakin},
     title = {Jackson's exact inequality with a~special module of continuity},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {51--67},
     year = {2012},
     volume = {18},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2012_18_4_a4/}
}