Sihabut, Tanasri, and Nikhom Laemsak. “Production of Oil Palm Frond Fiberboard and its Sound Absorption Characteristics”. Agriculture and Natural Resources 46, no. 1 (February 29, 2012): 120–126. accessed August 28, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/242757.