Graph Modelling of Transaction Networks for Fraud Detection and Systemic Risk Assessment in Nigerian Banks. Nigerian Journal of Operations Research, [S. l.], v. 3, n. 2, p. 1–55, 2026. DOI: 10.67868/sxet7739. Disponível em: https://nijor.org.ng/index.php/nijor/article/view/8. Acesso em: 31 aug. 2026.