@article{10_2140_agt_2005_5_1481,
     author = {Clay, Matt},
     title = {Contractibility of deformation spaces of {G-trees}},
     journal = {Algebraic and Geometric Topology},
     pages = {1481--1503},
     year = {2005},
     volume = {5},
     number = {4},
     doi = {10.2140/agt.2005.5.1481},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2005.5.1481/}
}