TY - JOUR AU - Maliszewski, Aleksander TI - On the differences of upper semicontinuous quasi-continuous functions JO - Mathematica slovaca PY - 1998 SP - 245 EP - 252 VL - 48 IS - 3 UR - http://geodesic.mathdoc.fr/item/MASLO_1998_48_3_a3/ LA - en ID - MASLO_1998_48_3_a3 ER -