@article{CMH_1972__47_139521,
     author = {Robert Bieri},
     title = {Gruppen mit {Poincar\'e-Dualit\"at}},
     journal = {Commentarii mathematici Helvetici},
     pages = {373--396},
     publisher = {mathdoc},
     volume = {47},
     year = {1972},
     zbl = {0254.20037},
     url = {http://geodesic.mathdoc.fr/item/CMH_1972__47_139521/}
}