KARMOUNI, M.; BOUA, H. Equality between different types of invertibility. Methods of Functional Analysis and Topology, [S. l.], v. 27, n. 1, p. 31–36, 2021. DOI: https://doi.org/10.31392/MFAT-npu26_1.2021.05. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/782. Acesso em: 15 dec. 2025.