Kurniawan, A. ., A. A. S. . Gunawan, B. . Hartanto, A. . Mili, and W. . Budiharto. “Swarm of Mobile Robots for Security Surveillance Based on Android Smartphone and Firebase”. International Journal of Intelligent Systems and Applications in Engineering, vol. 11, no. 4, Sept. 2023, pp. 810-5, https://ijisae.org/index.php/IJISAE/article/view/3614.