@Misc{ 
  GofPed21,
  author = { Goffi, Alessandro and Pediconi, Francesco },
  title = { Sobolev regularity for nonlinear Poisson equations with Neumann boundary conditions on Riemannian manifolds },
  journal = { Forum Mathematicum },
  year = { 2021 },
  doi = { 10.1515/forum-2022-0119 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5351/ },
  note = { cvgmt preprint}
}