@Article{ 
  RigSteTre20,
  author = { Rigoni, Chiara and Stepanov, Eugene and Trevisan, Dario },
  title = { Lie brackets of nonsmooth vector fields and commutation of their flows },
  journal = { J. London Math. Soc. },
  year = { 2020 },
  doi = { https://doi.org/10.1112/jlms.12597 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4884/ },
  note = { cvgmt preprint}
}