Suppalakpanya, K., R. Nikhom, T. Booranawong, and A. Booranawong*. “Study of Several Exponential Smoothing Methods for Forecasting Crude Palm Oil Productions in Thailand”. CURRENT APPLIED SCIENCE AND TECHNOLOGY, vol. 19, no. 2, Mar. 2019, pp. 123-39, https://li01.tci-thaijo.org/index.php/cast/article/view/185780.