@Misc{ 
  CavManMon24,
  author = { Cavalletti, Fabio and Manini, Davide and Mondino, Andrea },
  title = { Optimal transport on null hypersurfaces and the null energy condition },
  journal = {  },
  year = { 2024 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6738/ },
  note = { piprints preprint}
}