V. KAVITHA and MAHESHWARI.M, “IOT BASED CRACK DETECTING, OBSTACLE DETECTING AND ENERGY MINIMIZING ROBOT IN RAILWAY TRACK”, Int. j. innov. eng. res. technol., vol. 6, no. 6, pp. 1–5, Mar. 2021, Accessed: Jul. 04, 2024. [Online]. Available: https://repo.ijiert.org/index.php/ijiert/article/view/1851