Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1962_145_3_a16, author = {\`E. R. Rozendorn}, title = {Properties of asymptotic lines on surfaces with slowly varying negative curvature}, journal = {Doklady Akademii Nauk}, pages = {538--540}, publisher = {mathdoc}, volume = {145}, number = {3}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1962_145_3_a16/} }
È. R. Rozendorn. Properties of asymptotic lines on surfaces with slowly varying negative curvature. Doklady Akademii Nauk, Tome 145 (1962) no. 3, pp. 538-540. http://geodesic.mathdoc.fr/item/DAN_1962_145_3_a16/