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@article{MZ_1976__147_172322, author = {Norman Purzitsky}, title = {All {Two-Gnerator} {Fuchsian} {Group.}}, journal = {Mathematische Zeitschrift}, pages = {87--92}, publisher = {mathdoc}, volume = {147}, year = {1976}, zbl = {0305.20025}, url = {http://geodesic.mathdoc.fr/item/MZ_1976__147_172322/} }
Norman Purzitsky. All Two-Gnerator Fuchsian Group.. Mathematische Zeitschrift, Tome 147 (1976), pp. 87-92. http://geodesic.mathdoc.fr/item/MZ_1976__147_172322/