@Misc{ 
  RaiSko19,
  author = { Raita, Bogdan and Skorobogatova, Anna },
  title = { Continuity and canceling operators of order $n$ on $\mathbb{R}^n$ },
  journal = {  },
  year = { 2019 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4522/ },
  note = { cvgmt preprint}
}