Cheewaworanontree, Yossawat, Kridtharit Thongsin, and Piya Rontlaong. 2026. “Study on the Optimal Factors for Briquetting Charcoal from Coconut Shells Using a Full Factorial Experimental Design”. Wichcha Journal Nakhon Si Thammarat Rajabhat University 45 (1). ์Nakhon Si Thammarat, Thailand:48-62. https://doi.org/10.65217/wichchajnstru.2026.v45i1.265278.