@Misc{ 
  Muc21,
  author = { Mucci, Domenico },
  title = { The relaxed energy of fractional Sobolev maps with values into the circle },
  journal = {  },
  year = { 2021 },
  pages = { 34 },
  URL = { http://cvgmt.sns.it/paper/5406/ },
  note = { cvgmt preprint}
}