@article{CRMATH_2005__340_12_895_0,
     author = {Valette, Guillaume},
     title = {A bilipschitz version of {Hardt's} theorem},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {895--900},
     publisher = {Elsevier},
     volume = {340},
     number = {12},
     year = {2005},
     doi = {10.1016/j.crma.2005.05.004},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2005.05.004/}
}