@Misc{ 
  BelPaoTea13,
  author = { Bellettini, Giovanni and Paolini, Maurizio and Tealdi, Lucia },
  title = { On the area of the graph of a piecewise smooth map from the plane to the plane with a curve discontinuity },
  journal = {  },
  year = { 2014 },
  doi = { ESAIM: Control, Optimisation and Calculus of Variation },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2247/ },
  note = { cvgmt preprint}
}