TY - JOUR AU - Kučera, Jan TI - On the accessibility of control system $\dot x \in Q(x)$ JO - Czechoslovak Mathematical Journal PY - 1970 SP - 122 EP - 129 VL - 20 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1970.100951/ DO - 10.21136/CMJ.1970.100951 LA - en ID - 10_21136_CMJ_1970_100951 ER -