@article{IM_1995__120_2_144276,
     author = {Walter D. Neumann and Michael Shapiro},
     title = {Automatic structures, rational growth, and geometrically finite hyperbolic groups.},
     journal = {Inventiones mathematicae},
     pages = {259--288},
     publisher = {mathdoc},
     volume = {120},
     number = {2},
     year = {1995},
     zbl = {0831.20041},
     url = {http://geodesic.mathdoc.fr/item/IM_1995__120_2_144276/}
}