@article{10_21136_CMJ_1972_101117,
     author = {Sussmann, H\'ector J.},
     title = {The control problem $\dot x=A(u)x$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {490--494},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1972},
     doi = {10.21136/CMJ.1972.101117},
     mrnumber = {0308902},
     zbl = {0251.49015},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.21136/CMJ.1972.101117/}
}