A Rigidity Result for the Schiffer Conjecture on Domain with a Hole. Analysis in Theory and Applications, [S. l.], v. 41, n. 3, p. 229–237, 2025. DOI: 10.4208/ata.OA-2024-0023. Disponível em: https://global-sci.com/index.php/ata/article/view/22764. Acesso em: 5 dec. 2025.