@article{10_14708_wm_v7i1_2386,
     author = {W. Sierpi\'nski},
     title = {O niesko\'nczono\'sci},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 39--49},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1963},
     doi = {10.14708/wm.v7i1.2386},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v7i1.2386/}
}