@article{10_4064_fm_79_2_141_158,
     author = {Karol Borsuk},
     title = {On. positions of sets in spaces.},
     journal = {Fundamenta Mathematicae},
     pages = {141--158},
     publisher = {mathdoc},
     volume = {79},
     number = {2},
     year = {1973},
     doi = {10.4064/fm-79-2-141-158},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-79-2-141-158/}
}