@Misc{ 
  MazRosTol12a,
  author = { Mazón, José M. and Rossi, Julio and Toledo, Julian },
  title = { An optimal matching problem for the euclidean distance },
  journal = {  },
  year = { 2012 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2057/ },
  note = { cvgmt preprint}
}