Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1969__24_140947, author = {H. Hadwiger}, title = {Ungel\"oste {Probleme.}}, journal = {Elemente der Mathematik}, pages = {126--128}, publisher = {mathdoc}, volume = {24}, year = {1969}, url = {http://geodesic.mathdoc.fr/item/ELMA_1969__24_140947/} }
H. Hadwiger. Ungelöste Probleme.. Elemente der Mathematik, Tome 24 (1969), pp. 126-128. http://geodesic.mathdoc.fr/item/ELMA_1969__24_140947/