ELZIDANI, M. A.; ELSHEGMANI, Z. A. Order Projection of Linear Operators. مجلة البحوث الأكاديمية, [S. l.], v. 20, p. 11–16, 2021. Disponível em: https://lam-journal.ly/index.php/jar/article/view/394. Acesso em: 23 2024.