@Article{ 
  Rac11,
  author = { Racca, Simone },
  title = { A viscosity-driven crack evolution },
  journal = { Adv. Calc. Var. },
  year = { 2012 },
  doi = { 10.1515/acv-2011-0012 },
  volume = { 5 },
  pages = { 433-483 },
  URL = { http://cvgmt.sns.it/paper/1698/ },
  note = { cvgmt preprint}
}