@article{MM2_1973__8_154143,
     author = {Winfried Kaballo},
     title = {Zum {Abbildungsgrad} in {Hausdorffschen} topologischen {Vektorr\"aumen.}},
     journal = {Manuscripta mathematica},
     pages = {209--216},
     publisher = {mathdoc},
     volume = {8},
     year = {1973},
     zbl = {0247.47054},
     url = {http://geodesic.mathdoc.fr/item/MM2_1973__8_154143/}
}