@Article{ BonNovOrl19, author = { Bonafini, Mauro and Novaga, Matteo and Orlandi, Giandomenico }, title = { A variational scheme for hyperbolic obstacle problems }, journal = { Nonlinear Analysis }, year = { 2019 }, doi = { 10.1016/j.na.2019.06.008 0362-546X }, volume = { 188 }, pages = { 389-404 }, URL = { http://cvgmt.sns.it/paper/4194/ }, note = { cvgmt preprint} }