@article{10_14708_cm_v10i1_5580,
     author = {W. Holszty\'nski},
     title = {On metric spaces aimed at their subspaces},
     journal = {Commentationes Mathematicae},
     pages = { 95--100},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {1966},
     doi = {10.14708/cm.v10i1.5580},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v10i1.5580/}
}