Kurniawan, Jeffri, et al. “A Analysis of Gunshot Sensors and Buzzers on Bulletproof Vests in Real Time Based on Internet of Things (IoT)”. IRDH International Journal of Technology, Agriculture and Natural Sciences, vol. 2, no. 2, Jan. 2025, pp. 18-39, doi:10.64515/irdhijtans.v2i2.81.