Suryaman, R. M., and A. E. Pramono. “Pengaruh Radius Dies Teknik Arc Bottoming Pada Hasil Sudut Bending Proses U – Die Bending”. Prosiding Seminar Nasional Teknik Mesin, vol. 12, no. 1, Dec. 2022, pp. 1307-13, https://prosiding.pnj.ac.id/sntm/article/view/185.