OJHA, B. P.; BAJRACHARYA, P. M. Some remarks on the generalization of orthogonality in terms of operators. Methods of Functional Analysis and Topology, [S. l.], v. 27, n. 4, p. 302–307, 2021. DOI: https://doi.org/10.31392/MFAT-npu26_4.2021.02. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/804. Acesso em: 16 dec. 2025.