@Article{ 
  iwasbo01,
  author = { Iwaniec, Tadeusz and Sbordone, Carlo },
  title = { Quasiharmonic Fields },
  journal = { Ann. I. H. Poincaré - AN },
  year = { 2001 },
  volume = { 18 },
  number = { 5 },
  pages = { 519-572 },
  URL = { http://cvgmt.sns.it/paper/1073/ },
  note = { cvgmt preprint}
}