Somboonsuke, B., Yincharoen, A., Kongmanee, C., and Phitthayaphinant, P. 2019. “Rubber production system and livelihood of smallholding rubber farming system (SRFS) in southern Thailand: A case study in provinces of Nakhon Si Thammarat, Phatthalung and Trang”. International Journal of Agricultural Technology 15 (4):645-64. https://li04.tci-thaijo.org/index.php/IJAT/article/view/8273.