Visittiwong, A. . “Utilization of Fruit Orchard Waste: Durian and Mangosteen for Charcoal Briquette Production”. Rajamangala University of Technology Tawan-Ok Research Journal, vol. 14, no. 2, Dec. 2021, pp. 66-71, https://li01.tci-thaijo.org/index.php/researchjournal2rmutto/article/view/253411.