@article{GDZPPN002260360, title = {Sur la d\'eformation des surfaces}, journal = {Mathematische Annalen}, volume = {61}, year = {1905}, pages = {434-436}, zbl = {36.0672.01}, url = {http://dml.mathdoc.fr/item/GDZPPN002260360} }
Bernstein, Serge. Sur la déformation des surfaces. Mathematische Annalen, Tome 61 (1905) pp. 434-436. http://gdmltest.u-ga.fr/item/GDZPPN002260360/