%0 Journal Article %A I. V. Fomenko %T Global conditions for the existence of self-oscillatory regimes in %J Doklady Akademii Nauk %D 1989 %P 806-809 %V 308 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1989_308_4_a8/ %G ru %F DAN_1989_308_4_a8