@Article{ 
  boufra02,
  author = { Bouchitté, Guy and Fragalà, Ilaria },
  title = { Second order energies on thin structures: variational theory and non-local effects },
  journal = { Journal of Functional Analysis },
  year = { 2003 },
  volume = { 204 },
  pages = { 228-267 },
  URL = { http://cvgmt.sns.it/paper/175/ },
  note = { cvgmt preprint}
}