@Article{
  laztoa11,
  author = { Giuliano Lazzaroni and Rodica Toader },
  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 },
}