@article{10_14708_wm_v15i1_920,
     author = {A. Pe{\l}czy\'nski},
     title = {O pewnych problemach {Banacha}},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 3--11},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1972},
     doi = {10.14708/wm.v15i1.920},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v15i1.920/}
}