@Misc{ 
  LeDOtt12,
  author = { Le Donne, Enrico and Ottazzi, Alessandro },
  title = { Isometries of Carnot groups and subFinsler homogeneous manifolds },
  journal = {  },
  year = { 2012 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4163/ },
  note = { cvgmt preprint}
}