@article{10_4171_ggd_412,
     author = {Juhani Koivisto},
     title = {Non-amenability and visual {Gromov} hyperbolic spaces},
     journal = {Groups, geometry, and dynamics},
     pages = {685--704},
     year = {2017},
     volume = {11},
     number = {2},
     doi = {10.4171/ggd/412},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/412/}
}