Voir la notice de l'article provenant de la source European Digital Mathematics Library
@misc{ELMA_1968__23_140888, title = {Aufgaben.}, journal = {Elemente der Mathematik}, pages = {65--68}, publisher = {mathdoc}, volume = {23}, year = {1968}, url = {http://geodesic.mathdoc.fr/item/ELMA_1968__23_140888/} }
Aufgaben.. Elemente der Mathematik, Tome 23 (1968), pp. 65-68. http://geodesic.mathdoc.fr/item/ELMA_1968__23_140888/