@article{GT_2006_10_1_a6,
     author = {Calegari, Danny and Freedman, Michael H},
     title = {Distortion in transformation groups},
     journal = {Geometry & topology},
     pages = {267--293},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {2006},
     doi = {10.2140/gt.2006.10.267},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2006.10.267/}
}