Prathumyot, W., Makboon, R., Yota, M., Chakhatrakan, S., Matta, F. B., and Chitaree, L. “Effect of biogas effluent from pig manure and Longan (Dimocarpus longan) residues on growth of Marigold (Tagetes erecta)”. International Journal of Agricultural Technology 15, no. 2 (March 15, 2019): 347–358. accessed November 18, 2025. https://li04.tci-thaijo.org/index.php/IJAT/article/view/8217.