@article{VMUMM_1994_2_a6,
     author = {A. V. Badin},
     title = {Isometric embeddings of two-dimensional {Riemannian} metrics of negative curvature in $E^3$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {47--56},
     publisher = {mathdoc},
     number = {2},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1994_2_a6/}
}