W. N. S. E. Wan Jusoh, M. I. Yahaya, S. Zakaria, M. H. Mahamad Basri, and M. R. Daud, “DIRECTIONAL EFFECTS IN ROBOTIC MILLING OF UHMWPE: AN EMPIRICAL STUDY ON SURFACE ROUGHNESS”, IJIREV, vol. 8, no. 24, pp. 368–382, Mar. 2026.