@article{CM_1939__6__161_0,
     author = {Rueff, Marcel},
     title = {Beitr\"age zur {Untersuchung} der {Abbildungen} von {Mannigfaltigkeiten}},
     journal = {Compositio Mathematica},
     pages = {161--202},
     publisher = {Johnson Reprint Corporation},
     volume = {6},
     year = {1939},
     zbl = {0019.33104},
     language = {de},
     url = {http://www.numdam.org/item/CM_1939__6__161_0/}
}