Tjahjono, A., F. G. Pramesti, N. S. Frendyta, and P. A. . Paristiawan. “Increased Hardness Value of Medium Manganese Steel Through Double Tempering, Hot Rolling, and Variation of Cooling Media”. JURNAL ILMU FISIKA, vol. 16, no. 1, Feb. 2024, pp. 79-87, doi:10.25077/jif.16.1.79-87.2024.