R. Arjunraj, K. Kavinraj, K. Thandapani, and M. Vimal.M. “Fabrication of 360 Degree Flexible Drilling Machine”. International journal of intellectual advancements and research in engineering computations 7, no. 2 (August 5, 2021): 2651–2656. Accessed April 18, 2024. https://ijiarec.com/ijiarec/article/view/361.