ALFIANI, N.; RAKHMADI, F. A.; YATMAN, S. Instalasi dan Evaluasi Sistem Peringatan Dini Banjir Berbasis Sensor Ultrasonik HC-SR04 dan Internet of Things (IoT). Sunan Kalijaga Journal of Physics, [S. l.], v. 2, n. 2, p. 64–71, 2020. DOI: 10.14421/physics.v2i2.2339. Disponível em: https://journal.uin-suka.ac.id/saintek/physics/article/view/2339. Acesso em: 13 jul. 2025.