Manullang, R. ., Z. . Lubis, and P. M. . Raja. “Maintenance Strategy Analysis to Improve Ripple Mill Machine Effectiveness Using an Equipment Effectiveness Approach”. IRA Jurnal Teknik Mesin Dan Aplikasinya (IRAJTMA), vol. 4, no. 2, Aug. 2025, pp. 99-106, doi:10.56862/irajtma.v4i2.243.