@article{MZM_1988_43_4_a3,
     author = {A. G. Babenko},
     title = {Jackson's inequality for mean-square approximations of periodic functions by trigonometric polynomials on a uniform grid},
     journal = {Matemati\v{c}eskie zametki},
     pages = {460--473},
     publisher = {mathdoc},
     volume = {43},
     number = {4},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1988_43_4_a3/}
}