%0 Journal Article %A L. Markus %T Control of quasi-differential equations %J Annales Polonici Mathematici %D 1990 %P 229-239 %V 51 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-51-1-229-239/ %R 10.4064/ap-51-1-229-239 %G en %F 10_4064_ap_51_1_229_239