@Misc{ 
  LučPasRaj21,
  author = { Lučić, Danka and Pasqualetto, Enrico and Rajala, Tapio },
  title = { Non-Hilbertian tangents to Hilbertian spaces },
  journal = {  },
  year = { 2021 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5341/ },
  note = { cvgmt preprint}
}