Pipathattakul, M., P. Surin, and J. Wongon. “The Influence of Surface Modification on Tensile Strength of Single Sisal Fibre”. Thai Industrial Engineering Network Journal, vol. 3, no. 2, July 2017, pp. 29-36, https://ph02.tci-thaijo.org/index.php/ienj/article/view/178875.