@article{GDZPPN002410702,
title = {On the Exceptional Tangents to a Smooth, Plane Curve.},
journal = {Mathematische Zeitschrift},
volume = {129},
year = {1972},
pages = {359-360},
zbl = {0232.14012},
url = {http://dml.mathdoc.fr/item/GDZPPN002410702}
}
Iversen, Birger. On the Exceptional Tangents to a Smooth, Plane Curve.. Mathematische Zeitschrift, Tome 129 (1972) pp. 359-360. http://gdmltest.u-ga.fr/item/GDZPPN002410702/