@article{SM_2012_203_1_a4,
     author = {N. N. Pustovoitov},
     title = {Approximation of periodic functions in the classes~$H_q^\Omega$ by linear methods},
     journal = {Sbornik. Mathematics},
     pages = {88--110},
     publisher = {mathdoc},
     volume = {203},
     number = {1},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2012_203_1_a4/}
}