@article{10_14708_wm_v4i2_2462,
     author = {. Redaktor},
     title = {Zadania},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 209},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1961},
     doi = {10.14708/wm.v4i2.2462},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v4i2.2462/}
}