Accessible operators on ultraproducts of Banach spaces. Extracta Mathematicae, [S. l.], v. 39, n. 2, p. 207–234, 2025. DOI: 10.17398/2605-5686.39.2.207. Disponível em: https://revista-em.unex.es/index.php/EM/article/view/2605-5686.39.2.207.. Acesso em: 21 jan. 2025.