Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1956__11_140645, author = {H. Hadwiger}, title = {Ungel\"oste {Probleme.}}, journal = {Elemente der Mathematik}, pages = {60--61}, publisher = {mathdoc}, volume = {11}, year = {1956}, url = {http://geodesic.mathdoc.fr/item/ELMA_1956__11_140645/} }
H. Hadwiger. Ungelöste Probleme.. Elemente der Mathematik, Tome 11 (1956), pp. 60-61. http://geodesic.mathdoc.fr/item/ELMA_1956__11_140645/