Limhengha, Suphatchakorn, et al. “Properties and Cost of Natural Rubber Latex Foam Using Biomass Ash Filler from Agarwood Pellets”. BioResources, vol. 18, no. 3, July 2023, pp. 5585-98, https://ojs.bioresources.com/index.php/BRJ/article/view/22695.