CASTILLON, P.; RUFFINI, B. A spectral characterization of geodesic balls in non-compact rank one symmetric spaces. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 19, n. 4, p. 1359-1388, 2019. DOI: 10.2422/2036-2145.201612_011. Disponível em: https://journals.sns.it/index.php/annaliscienze/article/view/666. Acesso em: 20 feb. 2026.