Kheamrutai Thamaphat, Pichet Limsuwan, and Boonlaer Ngotawornchai. 2008. “Phase Characterization of TiO2 Powder by XRD and TEM”. Agriculture and Natural Resources 42 (5). Bangkok, Thailand:357-61. https://li01.tci-thaijo.org/index.php/anres/article/view/244620.