Karjadi, Daniel Avian, and Haryono Haryono. “Objects Monitoring RADAR Using Bluetooth Ultrasonic”. Sinkron : jurnal dan penelitian teknik informatika 6, no. 2 (March 28, 2022): 359-366. Accessed July 16, 2024. https://jurnal.polgan.ac.id/index.php/sinkron/article/view/11347.