@article{01310582, title = {The topology of the relative character varieties of a quadruply-punctured sphere.}, journal = {Experimental Mathematics}, volume = {8}, year = {1999}, pages = {85-103}, doi = {10.1080/10586458.1999.10504391}, zbl = {0957.57003}, language = {en}, url = {http://dml.mathdoc.fr/item/01310582} }
Benedetto, Robert L.; Goldman, William M. The topology of the relative character varieties of a quadruply-punctured sphere.. Experimental Mathematics, Tome 8 (1999) pp. 85-103. doi : 10.1080/10586458.1999.10504391. http://gdmltest.u-ga.fr/item/01310582/