@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/