@article{SM_2015_206_4_a5,
     author = {I. I. Sharapudinov},
     title = {Approximation properties of {Fej\'er-} and {de~la~Valle\'e-Poussin-type} means for partial sums of a~special series in the system $\{\sin x\sin kx\}_{k=1}^\infty$},
     journal = {Sbornik. Mathematics},
     pages = {600--617},
     publisher = {mathdoc},
     volume = {206},
     number = {4},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2015_206_4_a5/}
}