@article{ELMA_1960__15_140712,
     author = {W. Sierpinski},
     title = {Sur un probl\`eme concernant les nombres.},
     journal = {Elemente der Mathematik},
     pages = {73--74},
     year = {1960},
     volume = {15},
     zbl = {0093.04602},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1960__15_140712/}
}