@article{10_14708_wm_v20i02_3553,
     author = {. .},
     title = {Zadania},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 195--196},
     year = {1978},
     volume = {20},
     number = {02},
     doi = {10.14708/wm.v20i02.3553},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v20i02.3553/}
}