@article{MAN_1922__85_158923,
     author = {E.J. Wilczynski},
     title = {Charakteristische {Eigenschaften} der isothermkonjugierten {Kurvennetze}},
     journal = {Mathematische Annalen},
     pages = {208--212},
     publisher = {mathdoc},
     volume = {85},
     year = {1922},
     zbl = {48.0788.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1922__85_158923/}
}