R. M. Zulkifli, M. A. M. Nawi, S. N. A. Ahmad Termizi, M. A. R. Alias, M. S. M. Shabri, M. S. Kasim, R. Izamshah, and A. M. Kassim. 2025. “Effect of Spreader Drone Heights towards Granules Distribution”. Journal of Engineering Research and Education (JERE) 12 (April):67-78. https://ejournal.unimap.edu.my/index.php/jere/article/view/2053.