TY - JOUR AU - Marvin W. Grossman TI - An Extremal Property for Certain Spaces of Lower Semi-continuous Functions. JO - Mathematische Zeitschrift PY - 1968 SP - 139 EP - 148 VL - 106 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZ_1968__106_171011/ ID - MZ_1968__106_171011 ER -