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@article{PORMA_2001__58_1_49581, author = {Ranzato, F.}, title = {A counterexample to a result concerning closure operators.}, journal = {Portugaliae mathematica}, pages = {121--125}, publisher = {mathdoc}, volume = {58}, number = {1}, year = {2001}, zbl = {1001.06007}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_2001__58_1_49581/} }
Ranzato, F. A counterexample to a result concerning closure operators.. Portugaliae mathematica, Tome 58 (2001) no. 1, pp. 121-125. http://geodesic.mathdoc.fr/item/PORMA_2001__58_1_49581/