SALAH AL-DIN SAYED MAJEED, J.; AMER HUSSAIN, R. Building a Software System Using a Spiral Model to Evaluate the Overall Risk of Projects Using Fuzzy Number Theory. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 10, n. 1, p. 365–384, 2013. DOI: 10.33899/csmj.2013.163465 . Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36552. Acesso em: 2 nov. 2025.