@article{10_14708_wm_v11i1_2122,
     author = {A. Lelek},
     title = {K. {Borsuk,} {Theory} of retracts},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 154--156},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1969},
     doi = {10.14708/wm.v11i1.2122},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v11i1.2122/}
}