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@article{MAN_1891__39_157571, author = {A. Voss}, title = {Zur {Theorie} der {Kr\"ummung} der {Fl\"achen.}}, journal = {Mathematische Annalen}, pages = {179--256}, publisher = {mathdoc}, volume = {39}, year = {1891}, zbl = {23.0793.02}, url = {http://geodesic.mathdoc.fr/item/MAN_1891__39_157571/} }
A. Voss. Zur Theorie der Krümmung der Flächen.. Mathematische Annalen, Tome 39 (1891), pp. 179-256. http://geodesic.mathdoc.fr/item/MAN_1891__39_157571/