@article{10_14708_wm_v9i2_2233,
     author = {. Redaktor},
     title = {Zadania (141-153)},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 263--264},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1967},
     doi = {10.14708/wm.v9i2.2233},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v9i2.2233/}
}