@article{GDZPPN002246392,
title = {Zur Theorie der Curven doppelter Kr\"ummung .},
journal = {Mathematische Annalen},
volume = {20},
year = {1882},
pages = {72-83},
zbl = {13.0589.01},
url = {http://dml.mathdoc.fr/item/GDZPPN002246392}
}
Enneper. Zur Theorie der Curven doppelter Krümmung .. Mathematische Annalen, Tome 20 (1882) pp. 72-83. http://gdmltest.u-ga.fr/item/GDZPPN002246392/