%0 Journal Article %A B. G. Pachpatte %T Integral Perturbations of Nonlinear Systems of Differential Equations %J Ευκλείδης Γ %D 1987 %P 92-97 %V 14 %I mathdoc %U http://geodesic.mathdoc.fr/item/EUG_1987__14_a9/ %G gr %F EUG_1987__14_a9