@Misc{ 
  Ver23,
  author = { Verzellesi, Simone },
  title = { Ruled Hypersurfaces in Higher Dimensional Heisenberg Groups },
  journal = {  },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6051/ },
  note = { cvgmt preprint}
}