Ayu Nur Fithri, and Gusmi Kholijah. “Analysis of Stability of Lubricating Oil Discharge Using the Individual Moving Range (IM-R) Chart Method”. JURNAL ILMIAH MATEMATIKA DAN TERAPAN 22, no. 1 (December 31, 2025): 12 - 20. Accessed January 5, 2026. https://bestjournal.untad.ac.id/index.php/JIMT/article/view/17915.