@article{10_2140_agt_2011_11_2815,
     author = {Barnard, Josh},
     title = {A loop {theorem/Dehn{\textquoteright}s} lemma for some orbifolds},
     journal = {Algebraic and Geometric Topology},
     pages = {2815--2827},
     year = {2011},
     volume = {11},
     number = {5},
     doi = {10.2140/agt.2011.11.2815},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2011.11.2815/}
}