TY - JOUR AU - L. Drewnowski TI - Additive and countably additive correspondences JO - Commentationes Mathematicae PY - 1976 SP - 25 EP - 54 VL - 19 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/cm.v19i1.5836/ DO - 10.14708/cm.v19i1.5836 LA - pl ID - 10_14708_cm_v19i1_5836 ER -