@article{10_1017_S0017089500031414,
     author = {Bowers, Philip L. and Ruane, Kim},
     title = {Boundaries of nonpositively curved groups of the form {G} {\texttimes} {Zn}},
     journal = {Glasgow mathematical journal},
     pages = {177--189},
     year = {1996},
     volume = {38},
     number = {2},
     doi = {10.1017/S0017089500031414},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500031414/}
}