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)”, Int. J. Agric. Tech., vol. 15, no. 2, pp. 347–358, Mar. 2019.