Prawoto, Yunan, Sonia Manville, T Sakai, M Tanaka, and T Gnauple-Herold. “Manufacturing Process Beyond Conventional Plasticity Theory: Case Study in Manufacturing Low Spring Index Coil”. International Journal Applied Technology Research 1, no. 2 (October 1, 2020): 98 - 104. Accessed April 27, 2024. https://ijatr.polban.ac.id/ijatr/article/view/32.