@article{10_2140_agt_2012_12_1721,
     author = {Mart{\'\i}nez-P\'erez, \'Alvaro},
     title = {Bushy pseudocharacters and group actions on quasitrees},
     journal = {Algebraic and Geometric Topology},
     pages = {1721--1739},
     year = {2012},
     volume = {12},
     number = {3},
     doi = {10.2140/agt.2012.12.1721},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2012.12.1721/}
}