@article{MAN_1911__70_158512,
     author = {F. Imk\'acs},
     title = {Eine unstetige und differenzierbare {Funktion}},
     journal = {Mathematische Annalen},
     pages = {561--562},
     publisher = {mathdoc},
     volume = {70},
     year = {1911},
     zbl = {42.0420.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1911__70_158512/}
}