Prof. Nirajsingh Yeotikar, Avanishkumar Morya, Vishal Singh, Vikas Tiwari, and Shivam Tomar. “Rail Crack Detection Robot Using IR”. International Journal of Advance Research in Engineering, Science & Technology, vol. 3, no. 3, Mar. 2016, pp. 209-12, https://ijarest.org/index.php/ijarest/article/view/483.