@Misc{ 
  AbaOgn23,
  author = { Abatangelo, Laura and Ognibene, Roberto },
  title = { Sharp behavior of Dirichlet-Laplacian eigenvalues for a class of  singularly perturbed problems },
  journal = {  },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5889/ },
  note = { cvgmt preprint}
}