@misc{ELMA_1948__3_140477,
     title = {Aufgaben.},
     journal = {Elemente der Mathematik},
     pages = {39--42},
     publisher = {mathdoc},
     volume = {3},
     year = {1948},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1948__3_140477/}
}