Voir la notice de l'article provenant de la source Math-Net.Ru
@article{INTA_1974_12_a3, author = {\`E. G. Poznyak and E. V. Shikin}, title = {Surfaces of negative curvature}, journal = {Itogi Nauki i Tekhniki. Seriya Algebra. Geometriya. Topologiya }, pages = {171--207}, publisher = {mathdoc}, volume = {12}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/INTA_1974_12_a3/} }
È. G. Poznyak; E. V. Shikin. Surfaces of negative curvature. Itogi Nauki i Tekhniki. Seriya Algebra. Geometriya. Topologiya , Tome 12 (1974), pp. 171-207. http://geodesic.mathdoc.fr/item/INTA_1974_12_a3/