%0 Journal Article %A A. A. Lyapunov %T The works of P.\,S.~Novikov in the area of descriptive set theory %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1973 %P 11-22 %V 133 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1973_133_a2/ %G ru %F TM_1973_133_a2