Aziz, A. ., and A. . Zahra. “Prototype Design of Landfill Gas Pipe Leak Monitoring System Based on Microcontroller Node MCU ESP8266 With the Internet of Things Method”. International Journal of Intelligent Systems and Applications in Engineering, vol. 11, no. 2, Feb. 2023, pp. 133-47, https://ijisae.org/index.php/IJISAE/article/view/2604.