Decomposition of operators into span of unitary operators . Gulf Journal of Mathematics, [S. l.], v. 18, n. 1, p. 154–164, 2024. DOI: 10.56947/gjom.v18i1.2274. Disponível em: https://gjom.org/index.php/gjom/article/view/2274. Acesso em: 25 aug. 2026.