@misc{ELMA_1946__1_140426,
     title = {Aufgaben.},
     journal = {Elemente der Mathematik},
     pages = {20--22},
     publisher = {mathdoc},
     volume = {1},
     year = {1946},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1946__1_140426/}
}