@article{10_2140_agt_2010_10_2409,
     author = {Akhmedov, Azer},
     title = {On free discrete subgroups of {Diff(I)}},
     journal = {Algebraic and Geometric Topology},
     pages = {2409--2418},
     year = {2010},
     volume = {10},
     number = {4},
     doi = {10.2140/agt.2010.10.2409},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2010.10.2409/}
}