Aliyu, A. “FREE DISPOSAL HULL (FDH), ODER-M AND ODER-ALPHA (α) EFFICIENCY ANALYSIS FOR RUBBER SMALLHOLDERS IN MALAYSIA”. International Journal of Research -GRANTHAALAYAH 6, no. 6 (June 30, 2018): 1–15. Accessed October 29, 2025. https://www.granthaalayahpublication.org/journals/granthaalayah/article/view/IJRG18_A06_1411.