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@article{IM_1993__112_3_144111, author = {Eberhard Kirchberg}, title = {On non-semisplit extensions, tensor products and exactness of group {C*-algebras.}}, journal = {Inventiones mathematicae}, pages = {449--490}, publisher = {mathdoc}, volume = {112}, number = {3}, year = {1993}, zbl = {0803.46071}, url = {http://geodesic.mathdoc.fr/item/IM_1993__112_3_144111/} }
Eberhard Kirchberg. On non-semisplit extensions, tensor products and exactness of group C*-algebras.. Inventiones mathematicae, Tome 112 (1993) no. 3, pp. 449-490. http://geodesic.mathdoc.fr/item/IM_1993__112_3_144111/