Sangngarm, S. ., and W. Chaowiset. “Environment-Friendly Seedling Pot Made From Palm Oil Sludge and Water Hyacinth”. Journal of Advanced Development in Engineering and Science, vol. 13, no. 38, Jan. 2024, pp. 96-107, https://ph03.tci-thaijo.org/index.php/pitjournal/article/view/721.