Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1960_131_3_a3, author = {Ya. P. Blank}, title = {Surfaces carrying $\infty^2$ conical nets}, journal = {Doklady Akademii Nauk}, pages = {482--484}, publisher = {mathdoc}, volume = {131}, number = {3}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1960_131_3_a3/} }
Ya. P. Blank. Surfaces carrying $\infty^2$ conical nets. Doklady Akademii Nauk, Tome 131 (1960) no. 3, pp. 482-484. http://geodesic.mathdoc.fr/item/DAN_1960_131_3_a3/