Rosly, Nur Rafiqah, et al. “A Study on the Integration of Solar Energy and IoT in a Smart Parcel Drop Box As a Model for Sustainable Green Technology Application ”. Proceeding Economy of Asia International Conference, vol. 2025, no. 1, Jan. 2026, pp. 1433-9, https://conference.asia.ac.id/index.php/ecosia/article/view/240.