Putra, Y E, Sri Ratna Sulistiyanti, FX Arinto Setyawan, and A S Samosir. “Rapidness Characteristics of Ultrasonic Wave Propagation on Eggs Using HC-SR04 Module”. Journal of Engineering and Scientific Research 3, no. 1 (June 24, 2021): 26 –. Accessed June 23, 2025. https://jesr.eng.unila.ac.id/index.php/ojs/article/view/72.