TY - JOUR AU - Tamás Keleti TI - Difference functions of periodic measurable functions JO - Fundamenta Mathematicae PY - 1998 SP - 15 EP - 32 VL - 157 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-157-1-15-32/ DO - 10.4064/fm-157-1-15-32 LA - en ID - 10_4064_fm_157_1_15_32 ER -