%0 Journal Article %A Grzegorz Tomkowicz %T A free group of piecewise linear transformations %J Colloquium Mathematicum %D 2011 %P 141-146 %V 125 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm125-2-1/ %R 10.4064/cm125-2-1 %G en %F 10_4064_cm125_2_1