%0 Journal Article %A Ukpera, Awar Simon %T Further results for some third order differential systems with nonlinear dissipation %J Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica %D 2004 %P 155-169 %V 43 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AUPO_2004__43_1_a16/ %G en %F AUPO_2004__43_1_a16