@misc{ELMA_1982__37_141296,
     title = {Aufgaben.},
     journal = {Elemente der Mathematik},
     pages = {147--152},
     publisher = {mathdoc},
     volume = {37},
     year = {1982},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1982__37_141296/}
}