@article{10_21136_CMJ_1970_100951,
     author = {Ku\v{c}era, Jan},
     title = {On the accessibility of control system $\dot x \in Q(x)$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {122--129},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1970},
     doi = {10.21136/CMJ.1970.100951},
     mrnumber = {0284232},
     zbl = {0203.47703},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1970.100951/}
}