Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1941__2_1_114579, author = {Sebasti\~ao e Silva, J.}, title = {Sur l'axiomatique des espaces de {Hausdorff}}, journal = {Portugaliae mathematica}, pages = {93--109}, publisher = {mathdoc}, volume = {2}, number = {1}, year = {1941}, mrnumber = {0004755}, zbl = {0025.23801}, language = {fr}, url = {http://geodesic.mathdoc.fr/item/PORMA_1941__2_1_114579/} }
Sebastião e Silva, J. Sur l'axiomatique des espaces de Hausdorff. Portugaliae mathematica, Tome 2 (1941) no. 1, pp. 93-109. http://geodesic.mathdoc.fr/item/PORMA_1941__2_1_114579/