@Misc{ 
  GutManMor16a,
  author = { Gutt, Jan and Manno, Gianni and Moreno, Giovanni },
  title = { Completely exceptional $2^\textrm{nd}$ order PDEs via conformal geometry
  and BGG resolution },
  journal = {  },
  year = { 2016 },
  pages = {  },
  URL = { https://gecogedi.dimai.unifi.it/paper/384/ },
  note = { cvgmt preprint}
}