@article{10_2140_agt_2012_12_19,
     author = {Anderson, James~W and Wootton, Aaron},
     title = {A lower bound for the number of group actions on a compact {Riemann} surface},
     journal = {Algebraic and Geometric Topology},
     pages = {19--35},
     year = {2012},
     volume = {12},
     number = {1},
     doi = {10.2140/agt.2012.12.19},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2012.12.19/}
}