%0 Journal Article %A L. Z. Fishman %T Stability conditions for a fixed point of point maps in the critical case of a pair of complex conjugate roots on the unit circle %J Matematičeskie zametki %D 1992 %P 131-139 %V 52 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1992_52_6_a14/ %G ru %F MZM_1992_52_6_a14