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@article{CMH_1991__66_4_140225, author = {Vlad Sergiescu and Peter Greenberg}, title = {An acyclic extension of the braid group.}, journal = {Commentarii mathematici Helvetici}, pages = {109--138}, publisher = {mathdoc}, volume = {66}, number = {4}, year = {1991}, zbl = {0736.20020}, url = {http://geodesic.mathdoc.fr/item/CMH_1991__66_4_140225/} }
Vlad Sergiescu; Peter Greenberg. An acyclic extension of the braid group.. Commentarii mathematici Helvetici, Tome 66 (1991) no. 4, pp. 109-138. http://geodesic.mathdoc.fr/item/CMH_1991__66_4_140225/