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@article{CMH_1996__71_2_140412, author = {M.R. Bridson and Robert H. Gilman}, title = {Formal language theory and the geometry of 3-manifolds.}, journal = {Commentarii mathematici Helvetici}, pages = {525--555}, publisher = {mathdoc}, volume = {71}, number = {2}, year = {1996}, zbl = {0873.20026}, url = {http://geodesic.mathdoc.fr/item/CMH_1996__71_2_140412/} }
M.R. Bridson; Robert H. Gilman. Formal language theory and the geometry of 3-manifolds.. Commentarii mathematici Helvetici, Tome 71 (1996) no. 2, pp. 525-555. http://geodesic.mathdoc.fr/item/CMH_1996__71_2_140412/