@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/}
}