@Article{ 
  elehab,
  author = { Eleuteri, Michela and Habermann, Jens },
  title = { A Hölder continuity result for a class of obstacle problems under non standard growth conditions },
  journal = { Math. Nachr. },
  year = { 2011 },
  volume = { 284 },
  number = { 11-12 },
  pages = { 1404-1434 },
  URL = { http://cvgmt.sns.it/paper/526/ },
  note = { cvgmt preprint}
}