Graph-Theoretic Characterizations of Quasi-Idempotents in Full Order-Preserving Transformation Semigroup. Babylonian Journal of Mathematics, [S. l.], v. 2025, p. 88–91, 2025. DOI: 10.58496/BJM/2025/009. Disponível em: https://journals.mesopotamian.press/index.php/BJM/article/view/809. Acesso em: 1 sep. 2025.