A. MUSTAFA, R.; T. MAROUGI, G. The Basis Number of Quadruple Join of Graphs. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 9, n. 1, p. 27–34, 2012. DOI: 10.33899/csmj.2012.163685 . Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36722. Acesso em: 18 dec. 2025.