@article{10_4171_ggd_204,
     author = {Eric Swenson},
     title = {On cyclic {CAT(0)}  domains of discontinuity},
     journal = {Groups, geometry, and dynamics},
     pages = {737--750},
     year = {2013},
     volume = {7},
     number = {3},
     doi = {10.4171/ggd/204},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/204/}
}