@Article{ 
  PegSanXia17,
  author = { Pegon, Paul and Santambrogio, Filippo and Xia, Qinglan },
  title = { A fractal shape optimization problem in branched transport },
  journal = { Journal de Mathématiques Pures et Appliquées },
  year = { 2019 },
  doi = { 10.1016/j.matpur.2018.06.007 },
  volume = { 123 },
  pages = { 244-269 },
  URL = { http://cvgmt.sns.it/paper/3562/ },
  note = { cvgmt preprint}
}