Purwantono, Purwantono, Nelvi Erizon, Nofri Helmi, Muhammad Akhbar, and Muhibuddin Muhibuddin. “Effect of Spring Back on Formation Process of Sheet Metal Bending Plates”. Teknomekanik 3, no. 1 (May 25, 2020): 28-35. Accessed May 4, 2024. http://teknomekanik.ppj.unp.ac.id/index.php/teknomekanik/article/view/58.