@Article{ 
  leomassie01,
  author = { Leonetti, Francesco and Mascolo, Elvira and Siepe, Francesco },
  title = { Gradient regularity for minimizers of functionals   under $p-q$ subquadratic growth " },
  journal = { Bollettino UMI },
  year = { 2001 },
  volume = { (8) },
  number = { 4-B },
  pages = { 571-586 },
  URL = { http://cvgmt.sns.it/paper/1170/ },
  note = { cvgmt preprint}
}