Srikulkit, K., C. Iamsamai, and S. T. . Dubas. “Development of Flame Retardant Polyphosphoric Acid Coating Based on the Polyelectrolyte Multilayers Technique”. Journal of Metals, Materials and Minerals, vol. 16, no. 2, Apr. 2017, https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/260.