@article{10_14708_cm_v53i2_781,
     author = {Jerzy Grzybowski and Diethard Pallaschke and Ryszard Urba\'nski},
     title = {Algebraic {Separation} and {Shadowing} of {Arbitrary} {Sets}},
     journal = {Commentationes Mathematicae},
     pages = { 155\ensuremath{-}164},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {2013},
     doi = {10.14708/cm.v53i2.781},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v53i2.781/}
}