@article{MAN_1875__9_156701,
     author = {Zeuthen},
     title = {Sur une classe de points singuliers de surfaces},
     journal = {Mathematische Annalen},
     pages = {321--332},
     publisher = {mathdoc},
     volume = {9},
     year = {1875},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/MAN_1875__9_156701/}
}