PERDANA, Ferry Wahyu; AYUNI, Shazana Dhiya; WISAKSONO, Arief; SYAHRORINI, Syamsudduha. Prototype Social Distancing Reminder Using HC-SR04 Sensor At The Payment Counter Via A Smartphone: Prototype Pengingat Social Distancing Menggunakan Sensor HC-SR04 Pada Antrian Loket Pembayaran Via Smartphone. Procedia of Engineering and Life Science, [S. l.], v. 1, n. 2, 2021. DOI: 10.21070/pels.v1i2.952. Disponível em: https://pels.umsida.ac.id/index.php/PELS/article/view/952. Acesso em: 27 jun. 2025.