@Misc{ 
  ScaSch15,
  author = { Scala, Riccardo and Schimperna, Giulio },
  title = { A contact problem for viscoelastic bodies with  inertial effects and unilateral boundary constraints },
  journal = {  },
  year = { 2015 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2744/ },
  note = { cvgmt preprint}
}