Archaapinun, Kingpetch, Nirun Witit-Anun, and Patama Visuttipitukul. 2013. “Effect of Heat Treatment on Phase Transformation of TiO<sub>2</sub> And Its Reflectance Properties”. Journal of Metals, Materials and Minerals 23 (2). Bangkok, Thailand. https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/89.