@Misc{ 
  DePChl14,
  author = { De Pascale, Luigi and Jimenez, Chloé },
  title = { Duality theory and optimal transport for sand piles growing in a silos },
  journal = { Adv. Differential Equations },
  year = { 2015 },
  pages = { 24 },
  URL = { http://cvgmt.sns.it/paper/2597/ },
  note = { cvgmt preprint}
}