@article{10_2140_agt_2015_15_3011,
     author = {Ballas, Samuel and Long, Darren D},
     title = {Constructing thin subgroups commensurable with the figure-eight knot group},
     journal = {Algebraic and Geometric Topology},
     pages = {3009--3022},
     year = {2015},
     volume = {15},
     number = {5},
     doi = {10.2140/agt.2015.15.3011},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2015.15.3011/}
}