@Article{ 
  dav04,
  author = { Davini, Andrea },
  title = { Smooth approximation of weak Finsler metrics },
  journal = { Adv. Differential Equations },
  year = { 2005 },
  volume = { 18 },
  number = { 8 },
  pages = { 509-530 },
  URL = { http://cvgmt.sns.it/paper/1327/ },
  note = { cvgmt preprint}
}