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@article{PORMA_1951__10_2_114505, author = {M\"uller, Gert H.}, title = {�?ber die {Eigenschaften} der {Teilmengen} eines {Kuratowski'schen} {Raumes} - {II}}, journal = {Portugaliae mathematica}, pages = {53--70}, publisher = {mathdoc}, volume = {10}, number = {2}, year = {1951}, mrnumber = {0044106}, zbl = {0043.37901}, language = {de}, url = {http://geodesic.mathdoc.fr/item/PORMA_1951__10_2_114505/} }
Müller, Gert H. �?ber die Eigenschaften der Teilmengen eines Kuratowski'schen Raumes - II. Portugaliae mathematica, Tome 10 (1951) no. 2, pp. 53-70. http://geodesic.mathdoc.fr/item/PORMA_1951__10_2_114505/