@article{MZM_2008_84_5_a10,
     author = {A. V. Pokrovskii},
     title = {On the {Best} {Approximation} by {Trigonometric} {Polynomials} on {Convolution} {Classes} of {Analytic} {Periodic} {Functions}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {755--762},
     publisher = {mathdoc},
     volume = {84},
     number = {5},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2008_84_5_a10/}
}