Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1955__10_140615, author = {H. Hadwiger}, title = {Ungel\"oste {Probleme.}}, journal = {Elemente der Mathematik}, pages = {19--19}, publisher = {mathdoc}, volume = {10}, year = {1955}, url = {http://geodesic.mathdoc.fr/item/ELMA_1955__10_140615/} }
H. Hadwiger. Ungelöste Probleme.. Elemente der Mathematik, Tome 10 (1955), p. 19. http://geodesic.mathdoc.fr/item/ELMA_1955__10_140615/