@article{CM_1987__63_2_223_0,
     author = {Bavard, C.},
     title = {Courbure presque n\'egative en dimension 3},
     journal = {Compositio Mathematica},
     pages = {223--236},
     publisher = {Martinus Nijhoff Publishers},
     volume = {63},
     number = {2},
     year = {1987},
     mrnumber = {906372},
     zbl = {0642.53047},
     language = {fr},
     url = {http://www.numdam.org/item/CM_1987__63_2_223_0/}
}