@Misc{ 
  gia02a,
  author = { Giannetti, Flavia },
  title = { Elliptic complexes in the Calculus of Variations },
  journal = { Diss. Math. },
  year = { 2002 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1635/ },
  note = { cvgmt preprint}
}