Winarno, R., D. Daryono, and M. Jufri. “The Influence of Welding Ampere Range to ST-40 Shear Strength With Butt Joint”. Journal of Energy, Mechanical, Material, and Manufacturing Engineering, vol. 3, no. 2, Dec. 2018, pp. 113-8, doi:10.22219/jemmme.v3i2.7093.