On the Positivity of Scattering Operators for Poincaré-Einstein Manifolds. Journal of Mathematical Study, [S. l.], v. 54, n. 2, p. 186–199, 2021. DOI: 10.4208/jms.v54n2.21.05. Disponível em: https://global-sci.com/index.php/jms/article/view/13393. Acesso em: 27 feb. 2026.