@article{10_14708_wm_v9i1_2271,
     author = {. Redaktor},
     title = {Zadania (121-140)},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 97--101},
     year = {1966},
     volume = {9},
     number = {1},
     doi = {10.14708/wm.v9i1.2271},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v9i1.2271/}
}