%0 Journal Article %A Stamov, G. %T Integral Manifolds and Perturbations of the Nonlinear Part of Systems of Autonomous Differential Equations with Impulses at Fixed Moments %J Serdica Mathematical Journal %D 1995 %P 109-122 %V 21 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SMJ2_1995_21_2_a1/ %G en %F SMJ2_1995_21_2_a1