@Article{ 
  DaFiMuRa20,
  author = { Dappiaggi, Claudio and Finster, Felix and Murro, Simone and Radici, Emanuela },
  title = { The Fermionic Signature Operator in De Sitter Spacetime },
  journal = { Journal of Mathematical Analysis and Applications },
  year = { 2020 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4638/ },
  note = { cvgmt preprint}
}