%0 Journal Article %A Filipczak, Tomasz %T A note on the system of complements of sets sparse at a point %J Acta Universitatis Lodziensis. Folia Mathematica %D 1992 %V 05 %I mathdoc %U http://geodesic.mathdoc.fr/item/AULFM_1992_05_a14/ %G en %F AULFM_1992_05_a14