M. ALI, A.; M. ABDULLAH, M. Schultz and Modified Schultz Polynomials for Vertex – Identification Chain and Ring – for Hexagon Graphs. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 15, n. 1, p. 25–38, 2021. DOI: 10.33899/csmj.2021.168251. Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36491. Acesso em: 16 dec. 2025.