@misc{ELMA_1970__25_140997,
     title = {Neue {Aufgaben.}},
     journal = {Elemente der Mathematik},
     pages = {142--143},
     publisher = {mathdoc},
     volume = {25},
     year = {1970},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1970__25_140997/}
}