@Article{ 
  laztoa11,
  author = { Lazzaroni, Giuliano and Toader, Rodica },
  title = { Some remarks on the viscous approximation of crack growth },
  journal = { Discrete Contin. Dyn. Syst. Ser. S (DCDS-S) },
  year = { 2013 },
  volume = { 6 },
  number = { 1 },
  pages = { 131-146 },
  URL = { http://cvgmt.sns.it/paper/1283/ },
  note = { cvgmt preprint}
}