%0 Journal Article %A O. N. Ageev %T Dynamical systems with an even-mulriplicity Lebesgue component in the spectrum %J Sbornik. Mathematics %D 1989 %P 305-317 %V 64 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1989_64_2_a0/ %G en %F SM_1989_64_2_a0