Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1964__23_2_114921, author = {Hammer, Preston C.}, title = {Extended topology: continuity - {I}}, journal = {Portugaliae mathematica}, pages = {77--93}, publisher = {mathdoc}, volume = {23}, number = {2}, year = {1964}, mrnumber = {0210058}, zbl = {0151.29302}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1964__23_2_114921/} }
Hammer, Preston C. Extended topology: continuity - I. Portugaliae mathematica, Tome 23 (1964) no. 2, pp. 77-93. http://geodesic.mathdoc.fr/item/PORMA_1964__23_2_114921/