@article{agrachev2009controllability,
  title={Controllability on the group of diffeomorphisms},
  author={Agrachev, Andrei A and Caponigro, Marco},
  journal={Annales de l'Institut Henri Poincare (C) Non Linear Analysis},
  volume={26},
  number={6},
  pages={2503--2509},
  year={2009},
  publisher={Elsevier}
}