@article{05002573, title = {Representations of polygons of finite groups.}, journal = {Geometry \& Topology}, volume = {5}, year = {2005}, pages = {1915-1951}, doi = {10.2140/gt.2005.9.1915}, zbl = {1163.20029}, language = {en}, url = {http://dml.mathdoc.fr/item/05002573} }
Kapovich, Michael. Representations of polygons of finite groups.. Geometry & Topology, Tome 5 (2005) pp. 1915-1951. doi : 10.2140/gt.2005.9.1915. http://gdmltest.u-ga.fr/item/05002573/