@article{ELMA_1964__19_140797, author = {G\'abor Fejes T\'oth}, title = {Ungel\"oste {Probleme.}}, journal = {Elemente der Mathematik}, pages = {132--132}, year = {1964}, volume = {19}, url = {http://geodesic.mathdoc.fr/item/ELMA_1964__19_140797/} }