@article{CMH_1977__52_139683,
     author = {W.C. Hsiang and F.T. Farrell},
     title = {Rational {L-groups} of {Bieberbach} groups.},
     journal = {Commentarii mathematici Helvetici},
     pages = {89--110},
     publisher = {mathdoc},
     volume = {52},
     year = {1977},
     zbl = {0364.57003},
     url = {http://geodesic.mathdoc.fr/item/CMH_1977__52_139683/}
}