@Misc{ 
  MaiPer23a,
  author = { Mainini, Edoardo and Percivale, Danilo },
  title = { On the weighted inertia-energy approach to forced wave equations },
  journal = {  },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6021/ },
  note = { cvgmt preprint}
}