TY - JOUR AU - Tomasz Kobos TI - An alternative proof of Petty's theorem on equilateral sets JO - Annales Polonici Mathematici PY - 2013 SP - 165 EP - 175 VL - 109 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap109-2-5/ DO - 10.4064/ap109-2-5 LA - en ID - 10_4064_ap109_2_5 ER -