%0 Journal Article %A John Burgess %T A reflection phenomenon in descriptive set theory %J Fundamenta Mathematicae %D 1979 %P 127-139 %V 104 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-104-2-127-139/ %R 10.4064/fm-104-2-127-139 %G en %F 10_4064_fm_104_2_127_139