@Article{ 
  ChLaLeSt15,
  author = { Chambolle, Antonin and Lamboley, Jimmy and Lemenant, Antoine and Stepanov, Eugene },
  title = { Regularity for the optimal compliance problem with length penalization },
  journal = { SIAM J. Math. Anal. },
  year = { 2017 },
  volume = { 49 },
  number = { 2 },
  pages = { 1166-1224 },
  URL = { http://cvgmt.sns.it/paper/2874/ },
  note = { cvgmt preprint}
}