@article{JEMS_2011_13_5_a4,
     author = {G\'erard Besson and Gilles Courtois and Sylvestre Gallot},
     title = {Uniform growth of groups acting on {Cartan{\textendash}Hadamard} spaces},
     journal = {Journal of the European Mathematical Society},
     pages = {1343--1371},
     publisher = {mathdoc},
     volume = {13},
     number = {5},
     year = {2011},
     doi = {10.4171/jems/283},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/283/}
}