OKELO, B.; OTAE, L. On geometrical Aspects of Various Operators and their Orthogonality in Complex Normed Spaces. International Journal of Open Problems in Computer Science and Mathematics, [S. l.], v. 19, n. 1, p. 53–72, 2025. Disponível em: https://ijopcm.icsrs.uk/index.php/journal/article/view/52. Acesso em: 21 jun. 2026.