@Article{ 
  palpon03,
  author = { Palombaro, Mariapia and Ponsiglione, Marcello },
  title = { The three divergence free matrix fields problem },
  journal = { Asymptot. Anal. },
  year = { 2004 },
  volume = { 40 },
  number = { 1 },
  pages = { 37-49 },
  URL = { http://cvgmt.sns.it/paper/537/ },
  note = { cvgmt preprint}
}