%0 Journal Article %A Marek Balcerzak %A Udayan Darji %T Some examples of true $F_{σδ}$ sets %J Colloquium Mathematicum %D 2000 %P 203-207 %V 86 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-86-2-203-207/ %R 10.4064/cm-86-2-203-207 %G en %F 10_4064_cm_86_2_203_207