@Misc{ 
  LamMalMic19,
  author = { Lamm, Tobias and Malchiodi, Andrea and Micallef, Mario },
  title = { A gap theorem for $\alpha$-harmonic maps between two-spheres },
  journal = {  },
  year = { 2019 },
  pages = { 9 },
  URL = { http://cvgmt.sns.it/paper/4275/ },
  note = { cvgmt preprint}
}