@article{10_14708_wm_v9i1_2286,
     author = {R. Engelking},
     title = {W. {Sierpi\'nski,} {O} teorii mnogo\'sci},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 141--143},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {1966},
     doi = {10.14708/wm.v9i1.2286},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v9i1.2286/}
}