@Article{ 
  muc10a,
  author = { Mucci, Domenico },
  title = { Sobolev maps into the projective line with bounded total variation },
  journal = { Confluentes Math. },
  year = { 2010 },
  volume = { 2 },
  number = { 2 },
  pages = { 181-216 },
  URL = { http://cvgmt.sns.it/paper/805/ },
  note = { cvgmt preprint}
}