TY - JOUR AU - Chen, Yu Qing AU - Glover, Henry AU - Jensen, Craig TI - The center of some braid groups and the Farrell cohomology of certain pure mapping class groups JO - Algebraic and Geometric Topology PY - 2007 SP - 1987 EP - 2006 VL - 7 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.2140/agt.2007.7.1987/ DO - 10.2140/agt.2007.7.1987 ID - 10_2140_agt_2007_7_1987 ER -