@article{GT_2012_16_3_a2,
     author = {Bartels, Arthur and L\"uck, Wolfgang},
     title = {Geodesic flow for {CAT(0){\textendash}groups}},
     journal = {Geometry & topology},
     pages = {1345--1391},
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {2012},
     doi = {10.2140/gt.2012.16.1345},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2012.16.1345/}
}