@article{10_4064_aa_11_2_189_192,
     author = {P. Erd\"os},
     title = {On a problem of {Sierpi\'nski}},
     journal = {Acta Arithmetica},
     pages = {189--192},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {1965},
     doi = {10.4064/aa-11-2-189-192},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-11-2-189-192/}
}