@Article{ 
  deazap05,
  author = { De Arcangelis, Riccardo and Zappale, Elvira },
  title = { On the Relaxation of Variational Integrals with Pointwise Continuous-Type Gradient Constraints },
  journal = { Appl. Math. Optim. },
  year = { 2005 },
  volume = { 51 },
  pages = { 251-277 },
  URL = { http://cvgmt.sns.it/paper/881/ },
  note = { cvgmt preprint}
}