FREITAS, P.; SNYDER LAUGESEN, R. Two balls maximize the third Neumann eigenvalue in hyperbolic space. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 23, n. 3, p. 1325-1355, 2022. DOI: 10.2422/2036-2145.202010_059. Disponível em: https://journals.sns.it/index.php/annaliscienze/article/view/5442. Acesso em: 20 feb. 2026.