@article{10_14708_wm_v29i02_4488,
     author = {. Redaktor},
     title = {Zadania},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 269--270},
     year = {1992},
     volume = {29},
     number = {02},
     doi = {10.14708/wm.v29i02.4488},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v29i02.4488/}
}