@article{MAN_1875__9_156714,
     author = {Sturm},
     title = {Zur {Theorie} der algebraischen {Fl\"achen}},
     journal = {Mathematische Annalen},
     pages = {573--1},
     publisher = {mathdoc},
     volume = {9},
     year = {1875},
     zbl = {08.0393.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1875__9_156714/}
}