@Article{ 
  Ruf22,
  author = { Ruffoni, Lorenzo },
  title = { Manifolds without real projective or flat conformal structures },
  journal = { Proceedings of the American Mathematical Society },
  year = { 2022 },
  doi = { https://doi.org/10.1090/proc/16293 },
  pages = {  },
  URL = { https://gecogedi.dimai.unifi.it/paper/464/ },
  note = { cvgmt preprint}
}