Shahrul Azhar, Ilya Izyan, et al. “Maximum Quasi-Static Indentation Stress Analysis of Flax Epoxy and Glass Epoxy Polymer Composites”. International Journal of Integrated Engineering, vol. 14, no. 9, Dec. 2022, pp. 1-7, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/11940.