@Article{ 
  pet10,
  author = { Petrache, Mircea },
  title = { An integrability result for $L^p$-vectorfields in the plane  },
  journal = {  Advances in Calculus of Variations },
  year = { 2013 },
  doi = { 10.1515/acv-2012-0102 },
  volume = { Volume 6 },
  number = { 3 },
  pages = { 299–319 },
  URL = { http://cvgmt.sns.it/paper/913/ },
  note = { cvgmt preprint}
}