Voir la notice de l'article provenant de la source European Digital Mathematics Library
@misc{ELMA_1970__25_140973, title = {Aufgaben.}, journal = {Elemente der Mathematik}, pages = {63--67}, publisher = {mathdoc}, volume = {25}, year = {1970}, url = {http://geodesic.mathdoc.fr/item/ELMA_1970__25_140973/} }
Aufgaben.. Elemente der Mathematik, Tome 25 (1970), pp. 63-67. http://geodesic.mathdoc.fr/item/ELMA_1970__25_140973/