P. Vignesh, R. Ashok Kumar, M.Karthikeyan, R.Kavinkumar, K.Lathapriyan, and P.Manojkumar. “Experimental Design and Fabrication of a Portable Hydraulic Pipe Bending Machine”. International Journal of Intellectual Advancements and Research in Engineering Computations, vol. 6, no. 1, Mar. 2018, pp. 751-5, https://ijiarec.com/ijiarec/article/view/544.