A. Tjahjono, 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”, J. Ilmu Fis. , vol. 16, no. 1, pp. 79–87, Feb. 2024.