Mesfin Tafesse, Sakda Intaravichai, Banyat Saitthiti, and Thanya Kiatiwat. “The Optimum Design Parameters in Terms of Total Specific Energy Requirements for the Rotary Blade Power Tiller under Unsaturated Sandy Clay Loam Soil Condition”. Agriculture and Natural Resources 41, no. 4 (December 30, 2007): 775–781. accessed September 28, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/244323.