%0 Journal Article %A V. M. Millionshchikov %T Behavior of conditional stability under a~change of the parameters %J Izvestiya. Mathematics %D 1989 %P 331-354 %V 33 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1989_33_2_a5/ %G en %F IM2_1989_33_2_a5