@article{RMI_1992_1992_1_a11,
     author = {Otal, Jean-Pierre},
     title = {Geometr{\'\i}a simpl\'ectica del espacio de las geod\'esicas de una variedad con curvatura negativa.},
     journal = {Revista matem\'atica iberoamericana},
     pages = {441-456},
     publisher = {mathdoc},
     volume = {8},
     number = {3},
     year = {1992},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/RMI_1992_1992_1_a11/}
}