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@article{CMH_1983__58_139933, author = {Beno Eckmann and Peter Linnell}, title = {Poincar\'e duality groups of dimension two, {II.}}, journal = {Commentarii mathematici Helvetici}, pages = {111--114}, publisher = {mathdoc}, volume = {58}, year = {1983}, zbl = {0518.57003}, url = {http://geodesic.mathdoc.fr/item/CMH_1983__58_139933/} }
Beno Eckmann; Peter Linnell. Poincaré duality groups of dimension two, II.. Commentarii mathematici Helvetici, Tome 58 (1983), pp. 111-114. http://geodesic.mathdoc.fr/item/CMH_1983__58_139933/