@Article{ 
  man04,
  author = { Mantegazza, Carlo },
  title = { Evolution by Curvature of Networks of Curves in the Plane },
  journal = { Progress in Nonlin. Diff. Eqs. and Appl. },
  year = { 2004 },
  volume = { 59 },
  pages = { 95-109 },
  URL = { http://cvgmt.sns.it/paper/1128/ },
  note = { cvgmt preprint}
}