@article{05052474, title = {Distortion in transformation groups (with an appendix by Yves de Cornulier).}, journal = {Geometry \& Topology}, volume = {6}, year = {2006}, pages = {267-293}, doi = {10.2140/gt.2006.10.267}, zbl = {1106.37017}, language = {en}, url = {http://dml.mathdoc.fr/item/05052474} }
Calegari, Danny; Freedman, Michael H. Distortion in transformation groups (with an appendix by Yves de Cornulier).. Geometry & Topology, Tome 6 (2006) pp. 267-293. doi : 10.2140/gt.2006.10.267. http://gdmltest.u-ga.fr/item/05052474/