OKTAVIA, A.; TABITHA, A. K. .; DRAJAT, B. .; PUJIYULIANTO, E. . Analysis of Hardness Test and Microstructure Test of R.54 Type Railway Rail with Variations in Heat Treatment Cooling Media. Journal of Engineering and Scientific Research, [S. l.], v. 7, n. 2, p. 63–77, 2026. DOI: 10.23960/jesr.v7i2.175. Disponível em: https://jesr.eng.unila.ac.id.121-50-32-50.cpanel.site/index.php/ojs/article/view/175. Acesso em: 15 jan. 2026.