@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/}
}