@Misc{ 
  BabMor17,
  author = { Babadjian, Jean-François and Mora, Maria Giovanna },
  title = { Stress regularity in quasi-static perfect plasticity with a pressure dependent yield criterion },
  journal = {  },
  year = { 2017 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3307/ },
  note = { cvgmt preprint}
}