@article{SM_1976_29_4_a5,
     author = {L. V. Zhizhiashvili},
     title = {On trigonometric {Fourier} series},
     journal = {Sbornik. Mathematics},
     pages = {521--546},
     publisher = {mathdoc},
     volume = {29},
     number = {4},
     year = {1976},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1976_29_4_a5/}
}