Achanai Buasri, Chaitawat Singpracha, Chainan Junprasert, & Tawin Chotwatcharin. (2008). Synthesis and Characterization of Sol-Gel Processed Organic/ Inorganic Composite Materials. Agriculture and Natural Resources, 42(5), 367–372. retrieved from https://li01.tci-thaijo.org/index.php/anres/article/view/244622