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@article{MZM_1980_27_5_a9, author = {E. V. Shikin}, title = {Isometric embedding of two-dimensional manifolds of negative curvature by the {Darboux} method}, journal = {Matemati\v{c}eskie zametki}, pages = {779--794}, publisher = {mathdoc}, volume = {27}, number = {5}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1980_27_5_a9/} }
E. V. Shikin. Isometric embedding of two-dimensional manifolds of negative curvature by the Darboux method. Matematičeskie zametki, Tome 27 (1980) no. 5, pp. 779-794. http://geodesic.mathdoc.fr/item/MZM_1980_27_5_a9/