@Misc{ 
  AcCrNiTr22,
  author = { Acampora, Paolo and Cristoforoni, Emanuele and Nitsch, Carlo and Trombetti, Cristina },
  title = { A free boundary problem in thermal insulation with a prescribed heat
  source },
  journal = {  },
  year = { 2022 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6661/ },
  note = { piprints preprint}
}