Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1957__133_160536, author = {K. Wagner}, title = {\"Uber infinitesimale {Kerne} von {Punktmengen} in topologischen {R\"aumen.}}, journal = {Mathematische Annalen}, pages = {52--78}, publisher = {mathdoc}, volume = {133}, year = {1957}, zbl = {0077.16502}, url = {http://geodesic.mathdoc.fr/item/MAN_1957__133_160536/} }
K. Wagner. Über infinitesimale Kerne von Punktmengen in topologischen Räumen.. Mathematische Annalen, Tome 133 (1957), pp. 52-78. http://geodesic.mathdoc.fr/item/MAN_1957__133_160536/