@Article{ 
  focmar08,
  author = { Focardi, Matteo and Mariano, Paolo Maria },
  title = { Discrete dynamics of complex bodies with substructural dissipation: variational integrators and  convergence },
  journal = { Discrete Contin. Dynam. Systems B },
  year = { 2009 },
  volume = { 11 },
  number = { 1 },
  pages = { 109-130 },
  URL = { http://cvgmt.sns.it/paper/1438/ },
  note = { cvgmt preprint}
}