@Misc{ 
  bonbonros11,
  author = { Bonetti, Elena and Bonfanti, Giovanna and Rossi, Riccarda },
  title = { Analysis of a unilateral contact problem taking into account adhesion and friction },
  journal = {  },
  year = { 2011 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1254/ },
  note = { cvgmt preprint}
}