%0 Journal Article %A J. Bourgain %T $F_σδ$-section of Borel sets %J Fundamenta Mathematicae %D 1980 %P 129-133 %V 107 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-107-2-129-133/ %R 10.4064/fm-107-2-129-133 %G en %F 10_4064_fm_107_2_129_133