@Misc{ 
  SchSpe14,
  author = { Schikorra, Armin and Spector, Daniel and Van Schaftingen, Jean },
  title = { An $L^1$-type estimate for Riesz potentials },
  journal = {  },
  year = { 2014 },
  doi = {  arXiv:1411.2318 },
  pages = { 12 },
  URL = { http://cvgmt.sns.it/paper/2566/ },
  note = { cvgmt preprint}
}