%0 Journal Article %A V. V. Bykov %T To Millionshchikov's problem on the baire class of central exponents of diffeomorphisms %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2019 %P 17-22 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2019_5_a2/ %G ru %F VMUMM_2019_5_a2