@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/}
}