Muhammad Alam Brohi, Manzoor Hussain, Shamshad Lakho, Imran Ali Memon, and Zulqarnain Channa, “A Comparative Analysis of SaaS and PaaS Cloud-Based E-Learning Platforms in Terms of Cost-Effectiveness and Scalability”, IJIST, vol. 7, no. 6, pp. 184–195, May 2025.