Somboonsuke, B., Boonkongma, M., Kongmanee, C., Thatthong, K., and Prapatigul, P., “The connection between rubber production and livelihood under rubber farming system along with oil palm growing in the southeast coast of Thailand”, Int. J. Agric. Tech., vol. 17, no. 3, pp. 1147–1160, May 2021.