Madueke, C. I., R. Umunakwe, and O. M. Mbah. “Analysis of the effects of heat treatment on the tensile properties of coir fibres using Minitab-18 statistical software”. Engineering and Applied Science Research, vol. 49, no. 4, May 2022, pp. 612-21, https://ph01.tci-thaijo.org/index.php/easr/article/view/247423.