Uttraporn, T., S. Sucharitaku, G. Theeraraj, C. Yuwaree, C. Navanugraha, and R. Hutacharoen. “Waste Water Minimization: Utilization of Rubber Latex Residue and Swine Dung As Fertilizer for Para Rubber Seedling Growth”. Environment and Natural Resources Journal, vol. 10, no. 1, Nov. 2016, pp. 53-67, https://ph02.tci-thaijo.org/index.php/ennrj/article/view/71278.