@article{JRAM_1992__425_153397,
     author = {W.M. Goldman and John R. Parker},
     title = {Complex hyperbolic ideal triangle groups.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {71--86},
     publisher = {mathdoc},
     volume = {425},
     year = {1992},
     zbl = {0739.53055},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1992__425_153397/}
}