@article{AULFM_1995_07_a0,
     author = {Ch\k{a}dzy\'nska, Alina and Pustelnik, Miros{\l}aw},
     title = {Introducing a topology by an operation of a set-theoretic boundary},
     journal = {Acta Universitatis Lodziensis. Folia Mathematica},
     publisher = {mathdoc},
     volume = {07},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AULFM_1995_07_a0/}
}