@Misc{ 
  LeDMorRig20,
  author = { Le Donne, Enrico and Morbidelli, Daniele and Rigot, Severine },
  title = { Horizontally affine maps on step-two Carnot groups },
  journal = {  },
  year = { 2020 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4682/ },
  note = { cvgmt preprint}
}