%0 Journal Article %A A. Yu. Aleksandrov %A A. V. Platonov %A A. A. Kosov %T On the preservation of instability of mechanical systems under the evolution of dissipative forces %J The Bulletin of Irkutsk State University. Series Mathematics %D 2011 %P 3-19 %V 4 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IIGUM_2011_4_3_a0/ %G ru %F IIGUM_2011_4_3_a0