@Article{ 
  butdavfra02,
  author = { Buttazzo, Giuseppe and Davini, Andrea and Fragalà, Ilaria and Macià, Fabricio },
  title = { Optimal Riemannian distances preventing mass transfer },
  journal = { J. Reine Angew. Math. (Crelles Journal) },
  year = { 2004 },
  volume = { 575 },
  pages = { 157-171 },
  URL = { http://cvgmt.sns.it/paper/1626/ },
  note = { cvgmt preprint}
}