%0 Journal Article %A Rzepecki, Bogdan %T An application of a fixed point principle of Sadovskij to differential equations on the real line %J Commentationes Mathematicae Universitatis Carolinae %D 1985 %P 713-717 %V 26 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1985__26_4_a8/ %G en %F CMUC_1985__26_4_a8