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@article{PORMA_1994__51_1_47641, author = {Borges, Carlos R.}, title = {A study of -spaces and -spaces.}, journal = {Portugaliae mathematica}, pages = {109--117}, publisher = {mathdoc}, volume = {51}, number = {1}, year = {1994}, zbl = {0861.54012}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1994__51_1_47641/} }
Borges, Carlos R. A study of -spaces and -spaces.. Portugaliae mathematica, Tome 51 (1994) no. 1, pp. 109-117. http://geodesic.mathdoc.fr/item/PORMA_1994__51_1_47641/