Didar‑E‑Kibria. “National Helpline 333: Opportunities and Challenges of AI Voice Bot–Based Citizen Services”. Innovatech Engineering Journal 2, no. 04 (October 12, 2025): 01–07. Accessed October 23, 2025. https://journal.aimintlllc.com/index.php/ITEJ/article/view/84.