@misc{ELMA_1972__27_141044,
     title = {Neue {Aufgaben.}},
     journal = {Elemente der Mathematik},
     pages = {19--19},
     publisher = {mathdoc},
     volume = {27},
     year = {1972},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1972__27_141044/}
}