@article{RM_1998_53_6_a0,
     author = {A. A. Borisenko},
     title = {Extrinsic geometry of parabolic and saddle multidimensional manifolds},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1111--1158},
     publisher = {mathdoc},
     volume = {53},
     number = {6},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1998_53_6_a0/}
}