@article{GT_2014_18_2_a5,
     author = {Xie, Xiangdong},
     title = {Large scale geometry of negatively curved {\ensuremath{\mathbb{R}}n} \ensuremath{\rtimes} {\ensuremath{\mathbb{R}}}},
     journal = {Geometry & topology},
     pages = {831--872},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2014},
     doi = {10.2140/gt.2014.18.831},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2014.18.831/}
}