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@article{CMH_1993__68_2_140306, author = {Michael N. Dyer}, title = {Groups with no infinite perfect subgroups and aspherical 2-complexes.}, journal = {Commentarii mathematici Helvetici}, pages = {333--340}, publisher = {mathdoc}, volume = {68}, number = {2}, year = {1993}, zbl = {0791.57003}, url = {http://geodesic.mathdoc.fr/item/CMH_1993__68_2_140306/} }
Michael N. Dyer. Groups with no infinite perfect subgroups and aspherical 2-complexes.. Commentarii mathematici Helvetici, Tome 68 (1993) no. 2, pp. 333-340. http://geodesic.mathdoc.fr/item/CMH_1993__68_2_140306/