@article{MAN_1928__100_159304,
     author = {O. Sz\'asz},
     title = {\"Uber die {Fourierschen} {Reihen} gewisser {Funktionenklassen}},
     journal = {Mathematische Annalen},
     pages = {530--536},
     publisher = {mathdoc},
     volume = {100},
     year = {1928},
     zbl = {54.0309.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1928__100_159304/}
}