@article{RM_1973_28_4_a11,
     author = {M. I. Brin and Ya. B. Pesin},
     title = {Flows of frames on manifolds of negative curvature},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1973_28_4_a11/}
}