%0 Journal Article %A V. G. Kanovei %A V. A. Lyubetskii %T On some classical problems of descriptive set theory %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2003 %P 839-927 %V 58 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_2003_58_5_a0/ %G en %F RM_2003_58_5_a0