@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/}
}