Putra, P. A., Wardani, A. L., Laksmi , N. V., & Yuwono, A. H. (2026). Design and Development of a Hybrid Portable Emergency Energy Box System Based on a Solar Panel and Hand-Crank Generator with GPS Location Tracking. Proceeding of International Joint Conference on UNESA, 3(2). Diambil dari https://proceeding.unesa.ac.id/index.php/pijcu/article/view/8742