@article{MAN_1883__21_157068,
     author = {Sturm},
     title = {Ein {Analogon} zu {Gauss'} {Satz} von der {Kr\"ummung} der {Fl\"achen.}},
     journal = {Mathematische Annalen},
     pages = {379--384},
     publisher = {mathdoc},
     volume = {21},
     year = {1883},
     zbl = {15.0631.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1883__21_157068/}
}