TY - JOUR AU - Beno Eckmann AU - Peter Linnell TI - Poincaré duality groups of dimension two, II. JO - Commentarii mathematici Helvetici PY - 1983 SP - 111 EP - 114 VL - 58 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMH_1983__58_139933/ ID - CMH_1983__58_139933 ER -