@article{MAN_1912__72_158568,
     author = {T.H. Gronwall},
     title = {\"Uber die {Gibbssche} {Erscheinung} und die trigonometrischen {Summen} sin x + 4 .... sin 2x + ... + 1 n sin nx.},
     journal = {Mathematische Annalen},
     pages = {228--243},
     publisher = {mathdoc},
     volume = {72},
     year = {1912},
     zbl = {43.0323.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1912__72_158568/}
}