Closed mappings are open at a Gδ set
Levi, Sandro
Portugaliae mathematica, Tome 38 (1979), p. 7-9 / Harvested from Portugaliae Mathematica
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Publié le : 1979-01-01
EUDML-ID : urn:eudml:doc:115385 
@article{2895,
     author = {Levi, Sandro},
     title = {Closed mappings are open at a $G\_\delta $ set},
     journal = {Portugaliae mathematica},
     volume = {38},
     year = {1979},
     pages = {7-9},
     zbl = {0524.54009},
     mrnumber = {0745228},
     language = {en},
     url = {http://dml.mathdoc.fr/item/2895}
}

Levi, Sandro. Closed mappings are open at a $G_\delta $ set. Portugaliae mathematica, Tome 38 (1979) pp. 7-9. http://gdmltest.u-ga.fr/item/2895/