@article{MOMA_1954__57_176920,
     author = {R.W. Weitzenb\"ock},
     title = {Die {Flachtangenten} der ebenen {Kurven} vierter {Ordnung.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {142--169},
     publisher = {mathdoc},
     volume = {57},
     year = {1954},
     zbl = {0052.16702},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1954__57_176920/}
}