@Misc{ 
  Val25,
  author = { Valentini, Paolo },
  title = { Legendrian cycles and Alexandrov sphere theorems for $W^{2,n}$-hypersurfaces },
  journal = {  },
  year = { 2025 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/7073/ },
  note = { cvgmt preprint}
}