@article{MAN_1880__16_156900,
     author = {Du Bois-Reymond},
     title = {Ueber den {Satz} lim f'(x) = lim ........},
     journal = {Mathematische Annalen},
     pages = {550--550},
     publisher = {mathdoc},
     volume = {16},
     year = {1880},
     zbl = {12.0208.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1880__16_156900/}
}