@Article{ 
  Bin19,
  author = { Bindini, Ugo },
  title = { Smoothing operators in multi-marginal Optimal Transport },
  journal = { Math. Phys. Anal. Geom. },
  year = { 2020 },
  volume = { 23 },
  number = { 2 },
  pages = { 27 },
  URL = { http://cvgmt.sns.it/paper/4222/ },
  note = { cvgmt preprint}
}