@article{IVM_1974_10_a6,
     author = {A. P. Norden and B. P. Chebysheva},
     title = {Intrinsic geometry of a~hypersurface of a~space with degenerate metric},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {57--60},
     publisher = {mathdoc},
     number = {10},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1974_10_a6/}
}