TY - JOUR AU - Grzegorz Tomkowicz TI - A free group of piecewise linear transformations JO - Colloquium Mathematicum PY - 2011 SP - 141 EP - 146 VL - 125 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm125-2-1/ DO - 10.4064/cm125-2-1 LA - en ID - 10_4064_cm125_2_1 ER -