Piyang, T., and R. Khuawaraphan. “By-Product Synergy from Nipa Palm Frond Processing Waste Ban Laem Community, Trang Province”. Area Based Development Research Journal, Vol. 11, no. 6, Dec. 2019, pp. 503-17, https://so01.tci-thaijo.org/index.php/abcjournal/article/view/214084.