%0 Journal Article %A Gabriel Debs %A Jean Saint Raymond %T Filter descriptive classes of Borel functions %J Fundamenta Mathematicae %D 2009 %P 189-213 %V 204 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm204-3-1/ %R 10.4064/fm204-3-1 %G en %F 10_4064_fm204_3_1