1.
Al Jihad NG, Fatih Mufadhdhal M, Aprianto R. Design and Development of a Countdown Timer System in the Passenger Pickup and Drop-off Area Based on Ultrasonic Sensor. Jurnal Perintis. 2026;2(2(Maret-April):83-91. Accessed April 29, 2026. https://ejournal.pktj.ac.id/index.php/perintis/article/view/117