@Article{
  MonPigVit17,
  author = { Roberto Monti and Alessandro Pigati and Davide Vittone },
  title = { On tangent cones to length minimizers in Carnot-Carathéodory spaces },
  journal = { SIAM J. Control Optim. 56 (2018) },
  year = { 2018 },
  pages = {  },
}