Ritta, B., W. . Neadsanga, and K. . Runruksa. “The Study of Parameter of L-Bending Wiping Process Causing Spring Back by Simulating Finite Element”. RMUTL Engineering Journal, vol. 5, no. 2, Dec. 2020, pp. 19-25, doi:10.14456/rmutlengj.2020.9.