@Article{ 
  ConGar20,
  author = { Conti, Sergio and Garroni, Adriana },
  title = { Sharp rigidity estimates for incompatible fields as consequence of the  Bourgain Brezis div-curl result },
  journal = { C. R. Math. Acad. Sci. Paris },
  year = { 2021 },
  volume = { 359 },
  pages = { 155-160 },
  URL = { http://cvgmt.sns.it/paper/4822/ },
  note = { cvgmt preprint}
}