Wan Jusoh, W.N.S.E., Yahaya, M.I., Zakaria, S., Mahamad Basri, M.H. and Daud, M.R. 2026. DIRECTIONAL EFFECTS IN ROBOTIC MILLING OF UHMWPE: AN EMPIRICAL STUDY ON SURFACE ROUGHNESS. INTERNATIONAL JOURNAL OF INNOVATION AND INDUSTRIAL REVOLUTION (IJIREV). 8, 24 (Mar. 2026), 368–382. DOI:https://doi.org/10.35631/IJIREV.824022.