@article{MZM_1984_36_3_a17,
     author = {B. E. Kantor and S. A. Frangulov},
     title = {Isometric immersions of two-dimensional {Riemann} manifolds in {Pseudo-Euclidean} space},
     journal = {Matemati\v{c}eskie zametki},
     pages = {447--455},
     publisher = {mathdoc},
     volume = {36},
     number = {3},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1984_36_3_a17/}
}