@article{10_4171_ggd_326,
     author = {Sara Maloni and Fr\'ed\'eric Palesi and Ser Peow Tan},
     title = {On the character variety of the four-holed sphere},
     journal = {Groups, geometry, and dynamics},
     pages = {737--782},
     year = {2015},
     volume = {9},
     number = {3},
     doi = {10.4171/ggd/326},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/326/}
}