@Misc{ 
  KocRufSch23,
  author = { Koch, Lukas and Ruf, Matthias and Schäffner, Mathias },
  title = { On the Lavrentiev gap for convex, vectorial integral functionals },
  journal = {  },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6104/ },
  note = { cvgmt preprint}
}