Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MM2_1995__88_1_156128, author = {M. Magid and C. Scharlach and L. Vrancken}, title = {Affine umbilical surfaces in {R4.}}, journal = {Manuscripta mathematica}, pages = {275--290}, publisher = {mathdoc}, volume = {88}, number = {1}, year = {1995}, zbl = {0852.53014}, url = {http://geodesic.mathdoc.fr/item/MM2_1995__88_1_156128/} }
M. Magid; C. Scharlach; L. Vrancken. Affine umbilical surfaces in R4.. Manuscripta mathematica, Tome 88 (1995) no. 1, pp. 275-290. http://geodesic.mathdoc.fr/item/MM2_1995__88_1_156128/