@article{JRAM_1956__196_150313,
     author = {K. B\"ogel},
     title = {Die {Struktur} der stetigen {Funktionen} einer {Ver\"anderlichen.} {I.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--33},
     publisher = {mathdoc},
     volume = {196},
     year = {1956},
     zbl = {0070.28203},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1956__196_150313/}
}