%0 Journal Article %A Konečný, Milan %T Remarks on periodic solvability of nonlinear ordinary differential equations %J Commentationes Mathematicae Universitatis Carolinae %D 1977 %P 547-562 %V 18 %N 3 %U http://geodesic.mathdoc.fr/item/CMUC_1977_18_3_a12/ %G en %F CMUC_1977_18_3_a12