@Article{ 
  belchenov06,
  author = { Bellettini, Giovanni and Chermisi, Milena and Novaga, Matteo },
  title = { Crystalline curvature flow of planar networks },
  journal = { Interfaces Free Bound. },
  year = { 2006 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/686/ },
  note = { cvgmt preprint}
}