%0 Journal Article
%A Volodymyr V. Nekrashevych
%T Free subgroups in groups acting on rooted trees
%J Groups, geometry, and dynamics
%D 2010
%P 847-862
%V 4
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4171/ggd/110/
%R 10.4171/ggd/110
%F 10_4171_ggd_110