Suwanno, T., T. Veenin, and S. Jarusombuti. “Study on Fire-Retardant of Rubberwood Preservation With Boron Compounds”. Thai Journal of Forestry, vol. 36, no. 1, June 2017, pp. 129-35, https://li01.tci-thaijo.org/index.php/tjf/article/view/246919.