@article{AULFM_1992_05_a14,
     author = {Filipczak, Tomasz},
     title = {A note on the system of complements of sets sparse at a point},
     journal = {Acta Universitatis Lodziensis. Folia Mathematica},
     year = {1992},
     volume = {05},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AULFM_1992_05_a14/}
}