@Article{ 
  LamSic15,
  author = { Lamboley, Jimmy and Sicbaldi, Pieralberto },
  title = { New examples of extremal domains for the first eigenvalue of the Laplace-Beltrami operator in a Riemannian manifold with boundary },
  journal = { International Mathematics Research Notices, IMRN  },
  year = { 2015 },
  volume = { 18 },
  pages = { 8752-8798 },
  URL = { http://cvgmt.sns.it/paper/3075/ },
  note = { cvgmt preprint}
}