@Article{ 
  CasRuf16,
  author = { Castillon, Philippe and Ruffini, Berardo },
  title = { A spectral characterization of geodesic balls in non-compact rank one symmetric spaces },
  journal = { Ann. Scuola Norm. Sup. Pisa Cl. Sci. },
  year = { 2016 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3214/ },
  note = { cvgmt preprint}
}