@Article{ 
  daldemdes07,
  author = { Dal Maso, Gianni and Demyanov, Alexey and DeSimone, Antonio },
  title = { Quasistatic evolution problems for pressure-sensitive plastic materials },
  journal = { Milan J. Math. },
  year = { 2007 },
  volume = { 75 },
  pages = { 117-134 },
  URL = { http://cvgmt.sns.it/paper/893/ },
  note = { cvgmt preprint}
}