TY - JOUR AU - J. Meder TI - On a lemma of S. Kaczmarz JO - Colloquium Mathematicum PY - 1964 SP - 253 EP - 258 VL - 12 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-12-2-253-258/ DO - 10.4064/cm-12-2-253-258 LA - pl ID - 10_4064_cm_12_2_253_258 ER -