Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1963__22_4_114906, author = {Hammer, Preston C.}, title = {Extended topology: connected sets and {Wallace} separations}, journal = {Portugaliae mathematica}, pages = {167--187}, publisher = {mathdoc}, volume = {22}, number = {4}, year = {1963}, mrnumber = {0221457}, zbl = {0137.15601}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1963__22_4_114906/} }
Hammer, Preston C. Extended topology: connected sets and Wallace separations. Portugaliae mathematica, Tome 22 (1963) no. 4, pp. 167-187. http://geodesic.mathdoc.fr/item/PORMA_1963__22_4_114906/