@Article{ 
  HirTio20,
  author = { Hirsch, Jonas and Tione, Riccardo },
  title = { On the constancy theorem for anisotropic energies through differential  inclusions },
  journal = { Calc. Var. Partial Differential Equations },
  year = { 2020 },
  doi = { https://doi.org/10.1007/s00526-021-01981-z },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4911/ },
  note = { cvgmt preprint}
}