@Article{ 
  FelOgn20,
  author = { Felli, Veronica and Ognibene, Roberto },
  title = { Sharp convergence rate of eigenvalues in a domain with a shrinking tube },
  journal = { Journal of Differential Equations },
  year = { 2020 },
  doi = { https://doi.org/10.1016/j.jde.2019.12.022 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5306/ },
  note = { cvgmt preprint}
}