On vague Order and Decomposition Mapping by -Open Sets Using Nano. JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences, [S. l.], v. 26, n. 3, p. 69–77, 2018. Disponível em: https://journalofbabylon.com/index.php/JUBPAS/article/view/562. Acesso em: 19 apr. 2025.