M. ORINA; OKELO, B.; R. K. OBOGI. On Orthogonality of Elementary Operators in Normed Spaces. Journal of Mathematical Analysis and Modeling, [S. l.], v. 4, n. 1, p. 52–77, 2023. DOI: 10.48185/jmam.v4i1.505. Disponível em: https://sabapub.com/index.php/jmam/article/view/505. Acesso em: 6 oct. 2025.