@Misc{ 
  SavSod23,
  author = { Savaré, Giuseppe and Sodini, Giacomo Enrico },
  title = { A relaxation viewpoint to Unbalanced Optimal Transport: duality,
  optimality and Monge formulation },
  journal = {  },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6346/ },
  note = { cvgmt preprint}
}