%0 Journal Article %A Kučera, Jan %T On the accessibility of control system $\dot x \in Q(x)$ %J Czechoslovak Mathematical Journal %D 1970 %P 122-129 %V 20 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1970.100951/ %R 10.21136/CMJ.1970.100951 %G en %F 10_21136_CMJ_1970_100951