@article{10_14708_wm_v21i01_3574,
     author = {. .},
     title = {Zadania},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 83--84},
     publisher = {mathdoc},
     volume = {21},
     number = {01},
     year = {1978},
     doi = {10.14708/wm.v21i01.3574},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v21i01.3574/}
}