@article{MAN_1950__122_160206,
     author = {E. BURGER},
     title = {Zur {Theorie} der {\"UberlagerungsabbiIdung} von {Mannigfaltigkeiten}},
     journal = {Mathematische Annalen},
     pages = {144--151},
     publisher = {mathdoc},
     volume = {122},
     year = {1950},
     zbl = {0037.39701},
     url = {http://geodesic.mathdoc.fr/item/MAN_1950__122_160206/}
}