@Article{ 
  becstr10a,
  author = { Beck, Lisa and Stroffolini, Bianca },
  title = { Regularity results for differential forms solving degenerate elliptic systems },
  journal = { Calc. Var. Partial Differential Equations },
  year = { 2013 },
  doi = { 10.1007/s00526-012-0503-6 },
  volume = { 46 },
  number = { 3-4 },
  pages = { 769-808 },
  URL = { http://cvgmt.sns.it/paper/1420/ },
  note = { cvgmt preprint}
}