Deva Kurnia Bagus, M. Anhar, and A. Halim. “Uji Kekerasan Bahan Gear Sprocket Dengan Campuran Timah (Sn)”. Journal of Applied Mechanical Engineering and Renewable Energy, Vol. 1, no. 1, Feb. 2021, pp. 16-19, doi:10.52158/jamere.v1i1.80.