S. P. Raflesia, T. Taufiqurrahman, D. Lestarini, and A. Bardadi, “A Context-Aware Mobile-Based System for Crime Prevention and Emergencies”, IJEEI, vol. 9, no. 1, pp. 153–162, Mar. 2021, doi: 10.52549/ijeei.v9i1.2624.