@article{DOCMA_1999__4__a4,
     author = {Kirchberg, Eberhard and Wassermann, Simon},
     title = {Permanence properties of $C^*$-exact groups},
     journal = {Documenta mathematica},
     pages = {513--558},
     publisher = {mathdoc},
     volume = {4},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_1999__4__a4/}
}