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@article{DAN_1963_149_4_a6, author = {\`E. R. Rozendorn}, title = {The isolated singular point on a surface with regular metric and negative curvature}, journal = {Doklady Akademii Nauk}, pages = {780--783}, publisher = {mathdoc}, volume = {149}, number = {4}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1963_149_4_a6/} }
È. R. Rozendorn. The isolated singular point on a surface with regular metric and negative curvature. Doklady Akademii Nauk, Tome 149 (1963) no. 4, pp. 780-783. http://geodesic.mathdoc.fr/item/DAN_1963_149_4_a6/