Widiartini, Ni Kadek, et al. “Security Risk Evaluation of Licensing System Using NIST SP 800-30 Framework and Maturity Level With CMMI”. Journal of Electrical, Electronics and Informatics, vol. 9, no. 1, June 2025, pp. 1-9, https://ejournal1.unud.ac.id/index.php/JEEI/article/view/2244.