@Article{ 
  daldesmor06,
  author = { Dal Maso, Gianni and DeSimone, Antonio and Mora, Maria Giovanna and Morini, Massimiliano },
  title = { A vanishing viscosity approach to quasistatic evolution in plasticity with softening },
  journal = { Arch. Ration. Mech. Anal. },
  year = { 2008 },
  volume = { 189 },
  pages = { 469-544 },
  URL = { http://cvgmt.sns.it/paper/242/ },
  note = { cvgmt preprint}
}