Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1958__13_140679, author = {H. Hadwiger}, title = {Ungel\"oste {Probleme.}}, journal = {Elemente der Mathematik}, pages = {58--60}, publisher = {mathdoc}, volume = {13}, year = {1958}, url = {http://geodesic.mathdoc.fr/item/ELMA_1958__13_140679/} }
H. Hadwiger. Ungelöste Probleme.. Elemente der Mathematik, Tome 13 (1958), pp. 58-60. http://geodesic.mathdoc.fr/item/ELMA_1958__13_140679/