Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1960__15_140713, author = {H. Hadwiger}, title = {Ungel\"oste {Probleme.}}, journal = {Elemente der Mathematik}, pages = {74--75}, publisher = {mathdoc}, volume = {15}, year = {1960}, url = {http://geodesic.mathdoc.fr/item/ELMA_1960__15_140713/} }
H. Hadwiger. Ungelöste Probleme.. Elemente der Mathematik, Tome 15 (1960), pp. 74-75. http://geodesic.mathdoc.fr/item/ELMA_1960__15_140713/