Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MM2_1985__51_155066, author = {Ulrich Pinkall}, title = {Dupin'sche {Hyperfl\"achen} in {E4.}}, journal = {Manuscripta mathematica}, pages = {89--120}, publisher = {mathdoc}, volume = {51}, year = {1985}, zbl = {0572.53028}, url = {http://geodesic.mathdoc.fr/item/MM2_1985__51_155066/} }
Ulrich Pinkall. Dupin'sche Hyperflächen in E4.. Manuscripta mathematica, Tome 51 (1985), pp. 89-120. http://geodesic.mathdoc.fr/item/MM2_1985__51_155066/