Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1929__101_159333, author = {R. Rothe}, title = {\"Uber dreifach-orthogonale {Fl\"achensysteme}}, journal = {Mathematische Annalen}, pages = {273--283}, publisher = {mathdoc}, volume = {101}, year = {1929}, language = {de}, url = {http://geodesic.mathdoc.fr/item/MAN_1929__101_159333/} }
R. Rothe. Über dreifach-orthogonale Flächensysteme. Mathematische Annalen, Tome 101 (1929), pp. 273-283. http://geodesic.mathdoc.fr/item/MAN_1929__101_159333/