@article{10_4171_ggd_166,
     author = {Ursula Hamenst\"adt},
     title = {Isometry groups of proper {CAT(0)-spaces} of rank one},
     journal = {Groups, geometry, and dynamics},
     pages = {579--618},
     year = {2012},
     volume = {6},
     number = {3},
     doi = {10.4171/ggd/166},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/166/}
}