Sihabut, T. and Laemsak, N. (2012) “Production of Oil Palm Frond Fiberboard and its Sound Absorption Characteristics”, Agriculture and Natural Resources. Bangkok, Thailand, 46(1), pp. 120–126. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/242757 (accessed: 28 August 2026).