Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1954__9_140610, author = {H. Hadwiger}, title = {Ungel\"oste {Probleme.}}, journal = {Elemente der Mathematik}, pages = {111--111}, publisher = {mathdoc}, volume = {9}, year = {1954}, url = {http://geodesic.mathdoc.fr/item/ELMA_1954__9_140610/} }
H. Hadwiger. Ungelöste Probleme.. Elemente der Mathematik, Tome 9 (1954), p. 111. http://geodesic.mathdoc.fr/item/ELMA_1954__9_140610/