@article{IVM_2017_2_a6,
     author = {P. G. Stegantseva and M. A. Grechneva},
     title = {Grassman image of non-isotropic surface of pseudo-euclidean space},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {65--75},
     publisher = {mathdoc},
     number = {2},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2017_2_a6/}
}