Prathumyot, W., Chitaree, L., Chakhatrakan, S., Romkaew, J., Waramit, N., Matta, F. B., and Ehara, H. “Responses of sago palm under water deficiency condition”. International Journal of Agricultural Technology, vol. 14, no. 7, Dec. 2018, pp. 1679-84, https://li04.tci-thaijo.org/index.php/IJAT/article/view/8976.