@article{10_4171_ggd_74,
     author = {Mladen Bestvina and Mark Feighn},
     title = {A hyperbolic {Out(}$F_n$)-complex},
     journal = {Groups, geometry, and dynamics},
     pages = {31--58},
     year = {2010},
     volume = {4},
     number = {1},
     doi = {10.4171/ggd/74},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/74/}
}