K. Wangmo, T. Wangmo, U. Sonam, D. Lhamo, and K. Muramatsu, “Snow Depth Measurement Using Ultrasonic Sensor”, zm, vol. 3, no. 1, pp. 25–30, Jun. 2017, Accessed: Jun. 30, 2025. [Online]. Available: http://103.133.216.217/index.php/zm/article/view/72