@article{10_4171_ggd_445,
     author = {Ursula Hamenst\"adt and Sebastian Hensel},
     title = {Stability in {Outer} space},
     journal = {Groups, geometry, and dynamics},
     pages = {359--398},
     year = {2018},
     volume = {12},
     number = {1},
     doi = {10.4171/ggd/445},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/445/}
}