@article{RM_1981_36_4_a0,
     author = {Ya. B. Pesin},
     title = {Geodesic flows with hyperbolic behaviour of the trajectories and objects connected with them},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--59},
     publisher = {mathdoc},
     volume = {36},
     number = {4},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1981_36_4_a0/}
}