@inproceedings{Marigonda:2006n3,
  author = "Marigonda, Antonio",
  title = "{Second order controllability conditions for the controllability of control systems with drift}",
  doi = "10.22323/1.018.0012",
  booktitle = "Proceedings of Control Systems: Theory, Numerics and Applications {\textemdash} PoS(CSTNA2005)",
  year = 2006,
  volume = "018",
  pages = "012"
}