TY - JOUR AU - Roman Ger AU - Maciej Sablik TI - Mean values for vector valued functions and corresponding functional equations JO - Commentationes Mathematicae PY - 2013 SP - 355−369 VL - 53 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/cm.v53i2.796/ DO - 10.14708/cm.v53i2.796 LA - pl ID - 10_14708_cm_v53i2_796 ER -