V. KAVITHA; MAHESHWARI.M. IOT BASED CRACK DETECTING, OBSTACLE DETECTING AND ENERGY MINIMIZING ROBOT IN RAILWAY TRACK. International Journal of Innovations in Engineering Research and Technology, Maharashatra, India, v. 6, n. 6, p. 1–5, 2021. Disponível em: https://repo.ijiert.org/index.php/ijiert/article/view/1851.. Acesso em: 4 jul. 2024.