Voir la notice de l'article provenant de la source European Digital Mathematics Library
@misc{ELMA_1969__24_140915, title = {Neue {Aufgaben.}}, journal = {Elemente der Mathematik}, pages = {20--20}, publisher = {mathdoc}, volume = {24}, year = {1969}, url = {http://geodesic.mathdoc.fr/item/ELMA_1969__24_140915/} }
Neue Aufgaben.. Elemente der Mathematik, Tome 24 (1969), p. 20. http://geodesic.mathdoc.fr/item/ELMA_1969__24_140915/