Somboonsuke, B.; Yincharoen, A.; Kongmanee, C.; Phitthayaphinant, P. 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. Int. J. Agric. Tech. 2019, 15, 645-664.