@article{1365728,
      recid = {1365728},
      author = {Bieri, Robert, and Geoghegan, Ross,},
      title = {Connectivity properties of group actions on non-positively  curved spaces /},
      pages = {1 online resource (105 pages) :},
      note = {"January 2003, volume 161, number 765 (second of 5  numbers)."},
      url = {http://library.usi.edu/record/1365728},
}