@article{INTG_1966_1_a8,
     author = {V. V. Ryzhkov},
     title = {Riemannian geometries of higher order. {Imbedding} problem},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {265--330},
     publisher = {mathdoc},
     volume = {1},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1966_1_a8/}
}