@Misc{ 
  LeaTom21,
  author = { Leaci, Antonio and Tomarelli, Franco },
  title = { Bilateral Riemann-Liouville fractional Sobolev spaces },
  journal = { Note di Matematica },
  year = { 2021 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5297/ },
  note = { cvgmt preprint}
}