@article{MAN_1889__34_157438,
     author = {K\"opcke},
     title = {Ueber eine durchaus differentiirbare, stetige {Function} mit {Oscillationen} in jedem {Intervalle}},
     journal = {Mathematische Annalen},
     pages = {161--171},
     publisher = {mathdoc},
     volume = {34},
     year = {1889},
     url = {http://geodesic.mathdoc.fr/item/MAN_1889__34_157438/}
}