@article{MAN_1971__195_162206, author = {Jens Peter Reus Christensen}, title = {On {Some} {Properties} of {Effros} {Borel} {Structure} on {Spaces} of {Closed} {Subsets.}}, journal = {Mathematische Annalen}, pages = {17--23}, publisher = {mathdoc}, volume = {195}, year = {1971}, zbl = {0215.48303}, url = {http://geodesic.mathdoc.fr/item/MAN_1971__195_162206/} }