TY - JOUR AU - Gonçalves, Daciberg Lima AU - Guaschi, John TI - The braid groups of the projective plane JO - Algebraic and Geometric Topology PY - 2004 SP - 757 EP - 780 VL - 4 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.2140/agt.2004.4.757/ DO - 10.2140/agt.2004.4.757 ID - 10_2140_agt_2004_4_757 ER -