%0 Journal Article %A Vejvoda, Otto %T On the periodic solution of a quasi-linear non-autonomous system %J Czechoslovak Mathematical Journal %D 1961 %P 62-75 %V 11 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1961.100443/ %R 10.21136/CMJ.1961.100443 %G en %F 10_21136_CMJ_1961_100443