@Article{ 
  bec10a,
  author = { Beck, Lisa },
  title = { Boundary regularity for elliptic systems under a natural growth condition },
  journal = { Ann. Mat. Pura Appl. },
  year = { 2011 },
  doi = { 10.1007/s10231-010-0163-0 },
  volume = { 190 },
  number = { 4 },
  pages = { 553-588 },
  URL = { http://cvgmt.sns.it/paper/1243/ },
  note = { cvgmt preprint}
}