TY - JOUR AU - Jens Peter Reus Christensen TI - On Some Properties of Effros Borel Structure on Spaces of Closed Subsets. JO - Mathematische Annalen PY - 1971 SP - 17 EP - 23 VL - 195 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MAN_1971__195_162206/ ID - MAN_1971__195_162206 ER -