@Article{ 
  Til10,
  author = { Tilli, Paolo },
  title = { Some explicit examples of minimizers for the irrigation problem },
  journal = { J. Convex Anal. },
  year = { 2010 },
  volume = { 17 },
  number = { 2 },
  pages = { 583-595 },
  URL = { http://cvgmt.sns.it/paper/2035/ },
  note = { cvgmt preprint}
}