%0 Journal Article %A Stanisław Kasprzyk %T Stability in the large of certain non-linear systems of differential equations of order three %J Annales Polonici Mathematici %D 1971 %P 241-247 %V 25 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-25-3-241-247/ %R 10.4064/ap-25-3-241-247 %G en %F 10_4064_ap_25_3_241_247